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< [[Visuals]] | [[Graphics]] >{{Color navbox}}
= Enabling colors =
In current versions ConTeXt supports two color models: [http://en.wikipedia.org/wiki/RGB_color_model RGB] (earlier than 11typically used for screen display) and [http://en.05wikipedia.2009org/wiki/CMYK_color_model CMYK] (typically used for printing) of ConTeXt mkiv, . There is also support for [http://en.wikipedia.org/wiki/Spot_color spot colors are enabled by default] (typically used for offset printing) and transparencies.
In older versions, colors must be enabled using <cmd>setupcolors</cmd><tt>[state=Before you start]</tt>... =
Using colors with ConTeXt is easy:= Basic Usage =
== Choosing a color model ==
* RGB and CMYK are enabled by default. If you want only RGB or only CMYK To colortext, use <tt>cmyk=no</tt> or <tt>rgb=no</tt>. Multitone colors see below. * For spot colors, say spot=yes. To eliminate everything except spot colours, leaving a clean file for professional printing, accompany this with rgb=no,cmyk=no. See spot colours below for more details.* Normally all colors are defined in RGB ''and'' CMYK and get converted if needed.
== Using predefined colors: <cmdtexcode>setupcolor\color[defined-color]{ ... text ... }</cmdtexcode> ==
You find lists of predefined colors in the files <tt>colo-xxx.tex</tt>, load them with <cmd>setupcolor</cmd><tt>[xxx]</tt>:* rgb: some simple colors, loaded by default (with translations for the different interface languages!)* xwi: X-Windows-colors* pra: PRAGMA ADE company colors* ema: Emacs colorsor
* Try the magic <cmdtexcode>\startcolor[defined-color] ... text ... \stopcolor</texcode> where <code>showcolordefined-color</code> is a color defined using {{cmd>|definecolor}}. For example, <ttcode>[xxx]red</ttcode>!is one of the predefined colors. So, we can use:
== Defining colors: <cmd>definecolor</cmd> == <cmd>definecolor</cmd><tt>[blablue][r=.1, g=.1, b=1, c=1, m=.1, y=0, k=0, s=.2]</tt> (definition for RGB, CMYK and Grey!)or
=== Colors with Hexadecimal Numbers ===It is also possible to use RGB or CMYK or hex values to color text. The syntax for these is<texcode>\colored[settings]{... text ...}</texcode>where <code>settings</code> are the same settings as used by {{cmd|definecolor}}. For example:
You can also use hexadecimal numers to specify colors. You need to load the '''hex''' color module first:
===Transparent Colors===
You can define '''transparentNote''' colors through setting t, e.gThere is no need to use the color commands directly. Almost all ConTeXt commands accept a <code>color<tt/code>tkey, and you can use <code>color=0.5defined-color</ttcode>. BewareFor example, some PDF viewers and printshops can't handle PDF transparences! * To color the section titles red, use<texcode>\setuphead[color=red]</texcode>
Hans Hagen posted * To color the following sample code for transparent colors on the mailing list on 2005-07-13; the yellow blocks have been added to demonstrate the order in which the blocks are drawn on the page; the first yellow block is behind the transparent footnotes red and blue blocks, while the second is in front of them.use<texcode>\setupfootnotes[color=red]</texcode>
{|etc. ! width="45%"| ! width="10%"| ! width="45%"| |Pre- | <texcode>\definecolor [transparentred] [r=1,t=.5,a=1]\definecolor [transparentblue] [b=1,t=.5,a=1]\definecolor [solidyellow] [y=1,t=1,adefined colors =1]
\starttext
\startTEXpageThis is some sample text that goes behind the rectangles\hskip-8cm\blackrule[width=2cm,height=1cm,depth=1cm,color=solidyellow]\hskipDefault pre-0.67cm\blackrule[width=2cm,height=2cm,color=transparentred]\hskip-0.67cm\blackrule[width=2cm,height=1cm,depth=1cm,color=transparentblue]\hskip-0.67cm\blackrule[width=2cm,heightdefined colors =2cm,color=solidyellow]\hskip2cm.\stopTEXpage
\stoptext</texcode>The following colors are pre-defined in ConTeXt (see {{src||<context>\setupcolors[state=start]\definecolor [transparentred] [r=1,t=colo-imp-rgb.5,a=1]\definecolor [transparentblue] [b=1,t=mkiv}}).5,a=1]\definecolor [solidyellow] [y=1,t=1,a=1]
\starttext
\startTEXpageThis is some sample {| style="text that goes behind the rectangles\hskip-8cmalign: right; padding-right: 20px;"\blackrule[!| Name !! Color !style="width: 80px;"| Name !! Color !style=2cm,height"width: 100px;"| Name !! Color !style=1cm,depth"width: 100px;"| Name !! Color|-|black||bgcolor=1cm,color"#000"| |white||bgcolor=solidyellow]\hskip"#FFF"| |-0.67cm\blackrule[width|gray||bgcolor="#E6E6E6"| |lightgray||bgcolor="#D6D6D6"| |middlegray||bgcolor="#B9B9B9"| |darkgray||bgcolor="#999999"| |- |red||bgcolor="#FF0000"| |lightred||bgcolor="#FF0000"| |middlered||bgcolor="#CC0000"| |darkred||bgcolor="#990000"| |-|green||bgcolor="#00FF00"| |lightgreen||bgcolor="#00FF00"| |middlegreen||bgcolor="#00CC00"| |darkgreen||bgcolor="#009900"| |-|blue||bgcolor="#0000FF"| |lightblue||bgcolor="#0000FF"| |middleblue||bgcolor="#0000CC"| |darkblue||bgcolor="#000099"| |-|cyan||bgcolor=2cm,height"#00FFFF" | | ||bgcolor=2cm,color| |middlecyan||bgcolor=transparentred]\hskip"#00CCCC" | |darkcyan||bgcolor="#006666" | |-0.67cm\blackrule[width|magenta||bgcolor=2cm,height"#FF00FF" | | ||bgcolor=1cm,depth| |middlemagenta||bgcolor=1cm,color"CC00CC" | |darkmagenta||bgcolor=transparentblue]\hskip"660066" | |-0.67cm\blackrule[width|yellow||bgcolor=2cm,height"#FFFF00" | | ||bgcolor=2cm,color| |middleyellow||bgcolor=solidyellow]\hskip2cm."CCCC00" | \stopTEXpage|darkyellow||bgcolor="666600" |
\stoptext
</context>
<cmd>definepalet</cmd><tt>[palettename][colorname1=groupcolorThis loads the following additional colors:1, colorname2=groupcolor:2, ...]</tt>
Very interesting feature, to be described later... (see manual){| style="text-align: right; padding-right: 20px;"!| Name !! Color !style="width: 80px;"| Name !! Color !style="width: 100px;"| Name !! Color !style="width: 100px;"| Name !! Color|-|-|aliceblue||bgcolor="#EFF7FF"| |antiquewhite||bgcolor="#F9EAD6"| |aquamarine||bgcolor="#7FFFD3"| |azure||bgcolor="#EFFFFF"| |-|beige||bgcolor="#F4F4DB"| |bisque||bgcolor="#FFE2C4"| |black||bgcolor="#000000"| |blanchedalmond||bgcolor="#FFEACC"| |-|blue||bgcolor="#0000FF"| |blueviolet||bgcolor="#892BE2"| |brown||bgcolor="#A52828"| |burlywood||bgcolor="#DDB787"| |-|cadetblue||bgcolor="#5E9EA0"| |chartreuse||bgcolor="#7FFF00"| |chocolate||bgcolor="#D1681E"| |coral||bgcolor="#FF7F4F"| |-|cornflowerblue||bgcolor="#6393ED"| |cornsilk||bgcolor="#FFF7DB"| |cyan||bgcolor="#00FFFF"| |darkgoldenrod||bgcolor="#B7870A"| |-|darkgreen||bgcolor="#006300"| |darkkhaki||bgcolor="#BCB76B"| |darkolivegreen||bgcolor="#546B2D"| |darkorange||bgcolor="#FF8C00"| |-|darkorchid||bgcolor="#9933CC"| |darksalmon||bgcolor="#E8967A"| |darkseagreen||bgcolor="#8EBC8E"| |darkslateblue||bgcolor="#473D8C"| |-|darkturquoise||bgcolor="#00CED1"| |darkviolet||bgcolor="#9300D3"| |deeppink||bgcolor="#FF1493"| |deepskyblue||bgcolor="#00BFFF"| |-|dodgerblue||bgcolor="#1E8EFF"| |firebrick||bgcolor="#B22121"| |floralwhite||bgcolor="#FFF9EF"| |forestgreen||bgcolor="#218C21"| |-|gainsboro||bgcolor="#DBDBDB"| |ghostwhite||bgcolor="#F7F7FF"| |gold||bgcolor="#FFD600"| |goldenrod||bgcolor="#D8A521"| |-|green||bgcolor="#00FF00"| |greenyellow||bgcolor="#ADFF2D"| |honeydew||bgcolor="#EFFFEF"| |hotpink||bgcolor="#FF68B5"| |-|indianred||bgcolor="#CC5B5B"| |ivory||bgcolor="#FFFFEF"| |khaki||bgcolor="#EFE58C"| |lavender||bgcolor="#E5E5F9"| |-|lavenderblush||bgcolor="#FFEFF4"| |lawngreen||bgcolor="#7CFC00"| |lemonchiffon||bgcolor="#FFF9CC"| |lightblue||bgcolor="#ADD8E5"| |-|lightcoral||bgcolor="#EF7F7F"| |lightcyan||bgcolor="#E0FFFF"| |lightgoldenrod||bgcolor="#EDDD82"| |lightgoldenrodyellow||bgcolor="#F9F9D1"| |-|lightpink||bgcolor="#FFB5C1"| |lightsalmon||bgcolor="#FFA07A"| |lightseagreen||bgcolor="#21B2AA"| |lightskyblue||bgcolor="#87CEF9"| |-|lightslateblue||bgcolor="#8470FF"| |lightsteelblue||bgcolor="#AFC4DD"| |lightyellow||bgcolor="#FFFFE0"| |limegreen||bgcolor="#33CC33"| |-|linen||bgcolor="#F9EFE5"| |magenta||bgcolor="#FF00FF"| |maroon||bgcolor="#AF3060"| |mediumaquamarine||bgcolor="#66CCAA"| |-|mediumblue||bgcolor="#0000CC"| |mediumorchid||bgcolor="#BA54D3"| |mediumpurple||bgcolor="#9370DB"| |mediumseagreen||bgcolor="#3DB270"| |-|mediumslateblue||bgcolor="#7A68ED"| |mediumspringgreen||bgcolor="#00F999"| |mediumturquoise||bgcolor="#47D1CC"| |mediumvioletred||bgcolor="#C61484"| |-|midnightblue||bgcolor="#191970"| |mintcream||bgcolor="#F4FFF9"| |mistyrose||bgcolor="#FFE2E0"| |moccasin||bgcolor="#FFE2B5"| |-|navajowhite||bgcolor="#FFDDAD"| |navy||bgcolor="#00007F"| |navyblue||bgcolor="#00007F"| |oldlace||bgcolor="#FCF4E5"| |-|olivedrab||bgcolor="#6B8E23"| |orange||bgcolor="#FFA500"| |orangered||bgcolor="#FF4400"| |orchid||bgcolor="#D870D6"| |-|palegoldenrod||bgcolor="#EDE8AA"| |palegreen||bgcolor="#99F999"| |paleturquoise||bgcolor="#AFEDED"| |palevioletred||bgcolor="#DB7093"| |-|papayawhip||bgcolor="#FFEFD6"| |peachpuff||bgcolor="#FFD8BA"| |peru||bgcolor="#CC843F"| |pink||bgcolor="#FFBFCC"| |-|plum||bgcolor="#DDA0DD"| |powderblue||bgcolor="#AFE0E5"| |purple||bgcolor="#A021EF"| |red ||bgcolor="#FF0000"| |-|rosybrown||bgcolor="#BC8E8E"| |royalblue||bgcolor="#3F68E0"| |saddlebrown||bgcolor="#8C4411"| |salmon||bgcolor="#F97F72"| |-|sandybrown||bgcolor="#F4A360"| |seagreen||bgcolor="#2D8C56"| |seashell||bgcolor="#FFF4ED"| |sienna||bgcolor="#A0512D"| |-|skyblue||bgcolor="#87CEEA"| |slateblue||bgcolor="#6B59CC"| |snow||bgcolor="#FFF9F9"| |springgreen||bgcolor="#00FF7F"| |-|steelblue||bgcolor="#4482B5"| |tan ||bgcolor="#D1B58C"| |thistle||bgcolor="#D8BFD8"| |tomato||bgcolor="#FF6347"| |-|turquoise||bgcolor="#3FE0D1"| |violet||bgcolor="#ED82ED"| |violetred||bgcolor="#D1218E"| |wheat||bgcolor="#F4DDB2"| |-|white||bgcolor="#FFFFFF"| |whitesmoke||bgcolor="#F4F4F4"| |yellow||bgcolor="#FFFF00"| |yellowgreen||bgcolor="#99CC33"| |}
There In addition to the above, there are three basic strategies to select color combinations for a particular designtwo other sets of pre-defined colors.
# Create a {| class="wikitable"| x11 || <code>\usecolors[x11]</code>| {{src|colo-imp-x11.mkiv}}| 658 extended Xorg color scheme by picking several colors found within the objects to be used keywords (photographsWWW), pictures, etcdefined in hex RGB|-| crayola || <code>\usecolors[crayola] </code> | {{src|colo-imp-crayola.mkiv}} || 235 Crayola (Binney & Smith)colors# Create |-| ema || <code>\usecolors[ema]</code>| {{src|colo-imp-ema.mkiv}} || 549 Emacs colors derived from those found in the objects to be used# Create a |-| RAL || <code>\usecolors[ral]</code>| {{src|colo-imp-ral.mkiv}} || 213 RAL color scheme based on the message to convey system (Deutsches Institut für Gütesicherung und Kennzeichnung)|-| Solarized || <code>\usecolors[solarized]</ the psychological effects of colorcode>| {{src|colo-imp-solarized.mkiv}} || 16 solarized colors |}
See for additional help & reference:* [http://colorschemedesigner.com/ colorschemedesigner.com] - Useful site to help choose a color scheme in rgb color space* Tina Sutton, Bride M Whelan: The Complete Color Harmony. Rockport Publishers (2004). ISBN 978-1592530311 (recommanded in the mailing list)= Defining New Colors =
* Use the color name like '''Note''': The key-values are overloaded. For example, <ttcode>[color=blablue]h</ttcode> is used for both HSV model and Hex model; <code> in some s<tt/code>\setup..is used for both HSV model and grayscale model.The distinction is made based on the presence or absence of the <code>v</ttcode> commandkey.
Typeset single text elements with You can ''clone'' an existing color using<cmdtexcode>\definecolor[new-color</cmd><tt>][colornameold-color]{nice blue text}</tttexcode>:
! | width="45%"|<texcode>\usecolors[xwi]\definecolor[highlight][yellow]\defineframed [important] ! width [location=low, frame="10%"|off, ! width background=color, backgroundcolor="45%"|highlight] |-This is a \important{important}word. | <texcode>Three \colordefinecolor[highlight][redlavenderblush]This is a \important{coolimportant} catsword.
Alternatively, typeset text elements with <cmd>colored</cmd><tt>[rgb values]== Adapting existing colors == {colored text{todo | add details about this}}</tt> (suggested on NTG-ConTeXt: [http://www.ntg.nl/pipermail/ntg-context/2010/046563.html]): = Advanced Usage = == Changing color of entire document ==
{| ! width="45%"| ! width="10%"| ! width="45%"| |- | <texcode>Three \colored[r=.4, g=.4, b=.9]{colorful} kittens.</texcode>||<context>\setupcolors[state=start]\starttextThree \colored[r=.4, g=.4, b=.9]{colorful} kittens.\stoptext</context>|}To change the main text color of the document use
Typeset longer sections with <cmd>startcolor</cmd><tt>[colorname] ...</tt> <cmd>stopcolor</cmd>:For example,
|- | <texcode>\setupcolors[textcolor=blue]
\startcolor[orange]\input tufte\stopcolortext
\startcolor[orange]\input tufte\stopcolortext
{| ! width="45%"| ! width="10%"| ! width="45%"| |- | <texcode>\framed[The background=color, backgroundcolor=green]{bla}\framed[background=color, backgroundcolor=yellow, corner=00]{bla}of the page can be changed using</texcode>||<context>\setupcolorssetupbackgrounds[state=startpage] \starttext\framed[background=color, backgroundcolor=green]{bla}\framed[background=defined-color, backgroundcolor=yellow, corner=00]{bla}</contexttexcode>|}
== Background of the page ==
== Background of cells in tables ==
See
* [[Table#Background Colors]]
* [[TABLE#Round_corners]]
== In Metapost ==
Metapost == Using colors in MkIV is different from MkII and all labels are typesetand colored in TeX, if you want a label use label(textext("\blue RED"),origin) ;MetaPost ==
== In TikZ ==A color defined in TeX is available in MetaPost using `\MPcolor{...}`. For example:
! width="45%"| ! width="10%"| ! width="45%"| |- | <texcode>\usemoduledefinecolor[highlight][tikzr=0.8,g=0.8,b=0]
||<contextmode=mkiv>\setupcolorsdefinecolor[state=starthighlight]\usemodule[tikzr=0.8,g=0.8,b=0]
To produce a file ready for a clean PDF separation process at your print house, start with:
<cmd>setupcolors</cmd><tt>[rgb=no,cmyk=yes,spotUsing colors in TikZ =yes,state=start,overprint=yes]</tt>
which will set things up for spot colors with CMYK allowed. The last setting ensures that black overprinting your spot colour tints will not knock out the colour = Viewing pre- this is important for some types of commercial printing.defined color =
Then define your basic spot colour. Note that the name cannot contain spaces or numbers (but we come to that later):== View all defined colors ==
<To view pre-defined colors, you can use {{cmd>definecolor</cmd><tt>[PantoneTwoNineFour][c=1|showcolor}}. For example,m=to see all the colors defined in {{src|colo-imp-x11.56mkiv}},y=0,k=use (output truncated for display here ...18]</tt>)
Now you can define the tints of this ink that you are actually going to use in your document. Let's say you'll have a 100% for headings:{| |-|<texcode>\showcolor[x11]</texcode>|<context mode=mkiv>\startTEXpage[height=5cm]\showcolor[x11]\stopTEXpage</context>|}
<If you use {{cmd>definespotcolor</cmd><tt>[MyBlue][PantoneTwoNineFour][p=1]</tt>|showcolor}} without any argument, all currently defined colors are shown.
And then a 20% tint for nice display boxes:== View specific defined colors ==
<cmd>definespotcolor</cmd><tt>[MyBlueTint][PantoneTwoNineFour][p=.2]</tt>To view the components of a defined color, you can use:
And now you can happily use these named colours:* {{cmd|showcolorcomponents}}<texcode>\showcolorcomponents[color-1, color-2]</texcode>
<texcode>\starttext \color[MyBlue]{Interesting}\stoptext</texcode>For example,
If you are including graphics made by an external program{| |-|<texcode>\showcolorcomponents[red,middlered,darkred]</texcode>|<context mode=mkiv>\showcolorcomponents[red, you might want to match the colour name used in the graphic with the colour name in your '''ConTeXt''' set-up so that only one colour space is used in the final file. Unfortunately Pantone names and others tend to have spaces and numbers in themmiddlered, so you need to do some extra work.darkred]</context>|}
==Using the 'e' key to * {{cmd|colorcomponents}}* {{cmd|transparencycomponents}}* {{cmd|processcolorcomponents}}<texcode>\definespotcolor to specify a spot colour name with spaces==colorcompoents{defined-color}\tranparencycomponents{defined-color}\processcolorcomponents{defined-color}</texcode>
You can use the 'e' key when defining your spot colours in order to specify the precise colour names to be used by your ConTeXt set-up in the output file. For example:,{||-|<texcode>% set up the cmyk fallbacks\startlines\definecolor [PantoneThreeZeroEight] [c=1,m=.05,y=0,k=.47]colorcomponents{red}\definecolor [PantoneTwoNineEight] [c=.69,m=.07,y=0,k=0] % Define tints of spot colours to be used in document for colouring texttransparencycomponents{red}\definespotcolor [DarkBlue] [PantoneThreeZeroEight] [p=1,e=PANTONE 308 CV]processcolorcomponents{red}\definespotcolor [LightBlue] [PantoneTwoNineEight] [p=1,e=PANTONE 298 CV]stoplines
(Tested only on minimal Linux distribution dated 8 May 2010 - can others confirm thisto be true across the board now?) Any text between a <cmd>startcolor[DarkBlue]</cmd> and <cmd>stopcolor</cmd> should now be assigned to the correct spot colour channel - Pantone 308 CV - on output. More importantly = Testing if you include an external figure containing areas of this colour then your text and those parts of the graphic which have the same colour should now appear together in the 'Pantone 308 CV' colour channel on colour separation. For example, if your original graphic color is an EPS file containing the following lines: %%DocumentCustomColors: (PANTONE 298 CV) %%+ (PANTONE 308 CV) %%CMYKCustomColor: 0.69 0.07 0 0 (PANTONE 298 CV) %%+ 1 0.05 0 0.47 (PANTONE 308 CV) and you convert this to a PDF using <tt>ps2pdf</tt> for inclusion in your '''ConTeXt''' document your PDF graphic will then contain something like: <code> 8 0 obj [/Separation /PANTONE#20308#20CV /DeviceCMYK 9 0 R]endobj 10 0 obj [/Separation /PANTONE#20298#20CV /DeviceCMYK 11 0 R]endobj </code>defined =
Note how the space characters in the colour name are now encoded as '#20'To test if a color is defined, but the colour names are essentially identical between the original EPS graphic, the new PDF graphic and your text.use
A good way of testing colour separation if you don't have access to expensive pre-flight PDF validation tools is to use the following GhostScript command:* {{cmd|doifcolor}}* {{cmd|doifcolorelse}}
gs \ -dBATCH \ -dNOPAUSE \ -sDEVICE=tiffsep \ -dDOINTERPOLATE \ -dTextAlphaBits=4 \ -dGraphicsAlphaBits=4 \ -sOutputFile=output.tif \ -r120 \ -MaxSeparations=8 \ input.pdfUsage:
This renders a PDF file <tt>input.pdf</tt> as a set of TIFF files:
output.tif - Composite including CMYK approximations to spot colours
output.tif.Black.tif - K channel
output.tif.Cyan.tif - C channel
output.tif.Magenta.tif - M channel
output.tif.Yellow.tif - Y channel
output.tif.s0.tif - Pantone 308 CV
output.tif.s1.tif - Pantone 298 CV
=Multitones=
Hans wrote on the mailinglist on 2004-12-27 about handling of multitone colors:
Currently it's done by pdftools.rb
Once pdfxTeX becomes pdfeTeX out of a sudden your beta can do it as well.
I still need to figure out a way to automatically reverse the graphic, but one of these days you can start using it.
Actually, multitones for text already work out of the box:
(The CMYK color spec is the fall back color used on screen; one can preview separations in full Acrobat 7.)
Another sample by Hans (mailing list 2005* [http://paletton.com Paletton] -11Website to choose color palettes* [http://colorbrewer2.org/ ColorBrewer] -16) demonstrates a lot of different possibilities:website to choose colors for maps and graphics.
<texcode>\setuplayout[header=0pt,footer=0pt,width=middle,height=middle,backspace=1cm,topspace=1cm]\setupcolors[state=start] \startbuffer\definecolor [blue] [c=1, m=.38, y=0, k=.64]\definecolor [yellow] [c=0, m=.28, y=1, k=.06] \definespotcolor [blue-100] [blue] [p=1]\definespotcolor [yellow-100] [yellow] [p=1] \definemultitonecolor [combicolor] [blue=.12, yellow=.28] [c=.1, m=.1, y=.3, k=.1] \definemultitonecolor [combicolor-b] [blue=1] [c=1, m=.38, y=0, k=.64] % force multitone\definemultitonecolor [combicolor-y] [yellow=1] [c=0, m=.28, y=1, k=.06] % force multitone \useexternalfigure[demo-a][mill.png] [object=no* Tina Sutton, width=Bride M Whelan: The Complete Color Harmony.2\textwidth]\useexternalfigure[demo-b][hacker-bwRockport Publishers (2004).jpg][object=no, width=.2\textwidth] \startbaselinecorrection\startcombination[4*1] {\externalfigure[demo-a]} {no color} {\externalfigure[demo-a][color=combicolor]} {indexed duotone} {\externalfigure[demo-a][color=combicolor-b]} {spot color} {\externalfigure[demo-a][color=combicolorISBN 978-y]} {spot color}\stopcombination\stopbaselinecorrection1592530311 (recommanded in the mailing list)
\startbaselinecorrection
\startcombination[4*1]
{\externalfigure[demo-b]} {no color}
{\externalfigure[demo-b][color=combicolor]} {indexed duotone}
{\externalfigure[demo-b][color=combicolor-b]} {spot color}
{\externalfigure[demo-b][color=combicolor-y]} {spot color}
\stopcombination
\stopbaselinecorrection
\startbaselinecorrection
\startcombination[4*1]
{\externalfigure[demo-a]} {no color}
{\externalfigure[demo-a][color=combicolor]} {indexed duotone}
{\externalfigure[demo-a][color=blue-100]} {spot color}
{\externalfigure[demo-a][color=yellow-100]} {spot color}
\stopcombination
\stopbaselinecorrection
\startbaselinecorrection
\startcombination[4*1]
{\externalfigure[demo-b]} {no color}
{\externalfigure[demo-b][color=combicolor]} {indexed duotone}
{\externalfigure[demo-b][color=blue-100]} {spot color}
{\externalfigure[demo-b][color=yellow-100]} {spot color}
\stopcombination
\stopbaselinecorrection
\stopbuffer
\getbuffer \typebuffer
\stoptext
</texcode>
= References =
See "Color and Background" in the manual{{Getting started navbox}}
→Defining New Colors: bit of visual cleanup
1. It is usually a bad style to use explicit color switches in the text. It is better to define a semantic command that takes care of the color switching. For example, instead of using <code>\color[red]{important text}</code>, define<texcode>\definehighlight[important][color=Defining red]</texcode>and then use <code>\important{important text}</code> in the text. 2. Colorsare not enabled by default in MkII. To enabled colors in MkII, use<texcode>\setupcolors[state=start]</texcode> 3. To disable colors in a document, use<texcode>\setupcolors[state=stop]</texcode>
{|
! width="2545%"|
! width="10%"|
! width="6545%"|
|-
| <texcode>
Three \showcolorcolor[rgbred]{cool} cats
</texcode>
|
| <contextmode=mkiv>\setupcolorsstarttextThree \color[state=startred]{cool} cats\showcolor[rgb]stoptext
</context>
|}
{|
|-
| <texcode>
\definecolorstarttext\startcolor[blablue][r=.25, g=.1, b=1, c=1, m=.1, y=0, k=0, s=.2red]\input tufte\stopcolorHere's some \color[blablue]{blue text} inbetween!stoptext
</texcode>
|
| <contextmode=mkiv>\setupcolorssetuppapersize[state=startA5]\definecolorstarttext\startcolor[blablue][r=.1, g=.1, b=1, c=1, m=.1, y=0, k=0, s=.2red]\input tufte\stopcolorHere's some \color[blablue]{blue text} inbetween!stoptext
</context>
|}
{|
! width="45%"|
|-
| <texcode>
Three \setupcolorcolored[hex]\definecolor[salmon][hr=0.1, g=AB5757] Hey0.8, \color[salmonb=0.8]{look at that!colorful}cats
</texcode>
|
|<contextmode=mkiv>\setupcolors[state=start]starttextThree \setupcolorcolored[hex]\definecolor[salmon][hr=0.1, g=AB5757] Hey0.8, \color[salmonb=0.8]{look at that!colorful}cats\stoptext
</context>
|}
|}
== Defining X11 Colors == In addition to the above basic color schemes, ConTeXt also includes a definition of the [http: <cmd>definecolorgroup</cmd> and <cmd>definepalet</cmd>==www.w3.org/TR/2002/WD-css3-color-20020219/#x11-color X11 colors]. To load this list ({{src|colo-imp-xwi.mkiv}}), use <cmd>definecolorgroup</cmd><tttexcode>\usecolors[name][system][valuesxwi]</tttexcode>
=Choosing a color scheme= Additional pre-defined colors ==
New colors may be defined in the following ways
{| class=Using Colors"wikitable"! Name !! Syntax (and Example) !! Explanation|-| style="width:20%;" | RGB color model| style="width:40%;" | <texcode>\definecolor[...][r=..., g=..., b=...]</texcode> For example,<texcode>\definecolor[lime][r=0.75, g=1, b=0] This is \color[lime]{a new color}that we defined</texcode>| The values for <code>r</code>, <code>g</code>, and <code>b</code> are floating point number between <code>0</code> and <code>1</code>. |-| CMYK color model| <texcode>\definecolor[...][c=.., m=.., y=.., k=..]</texcode> For example,<texcode>\definecolor[lime][c=0.25, m=0, y=1, k=0] This is \color[lime]{a new color}that we defined</texcode>| The values for <code>c</code>, <code>m</code>, <code>y</code> and <code>k</code> are floating point number between <code>0</code> and <code>1</code>. |-| HSV color model|<texcode>\definecolor[...][h=.., s=.., v=..]</texcode> For example,<texcode>\definecolor[lime][h=75, s=1, v=1] This is \color[lime]{a new color}that we defined</texcode>| The value for <code>h</code> is between <code>0</code> and <code>360</code>; the values for <code>s</code>, <code>v</code> are floating point numbers between <code>0</code> and <code>1</code>. |-| Hex| <texcode>\definecolor[...][h=...]</texcode> For example,<texcode>\definecolor[lime][h=BFFF00] This is \color[lime]{a new color}that we defined</texcode>| The value for <code>x</code> is a three-byte hexadecimal number where the bytes represent the red, green, and blue values. This follows the HTML and CSS style of defining colors.|-|Gray scale|<texcode>\definecolor[...][s=...]</texcode> For example,<texcode>\definecolor[screen][g=0.5] This is \color[screen]{a new color}that we defined</texcode>| The value for <code>s</code> is a floating point number between <code>0</code> and <code>1</code>, representing the grayness value (1 represents white, 0 represents black).|}
== With text Cloning existing colors ==
For example
{|
</texcode>
| width="10%"|| width="45%"|<contextmode=mkiv>\usecolors[xwi]\definecolor[highlight][yellow]\setupcolorsdefineframed[important][statelocation=low, frame=off, background=color, backgroundcolor=starthighlight] This is a \starttextimportant{important}word. Three \colordefinecolor[highlight][redlavenderblush]This is a \important{coolimportant} cats\stoptextword.
</context>
|}
<texcode>\setupcolors[textcolor=defined-color]</texcode>
{|
! width="10%"|
! width="45%"|
\starttext
\stoptext
</texcode>
|
|<contextmode=mkiv>\setupcolors[statetextcolor=startblue]
\starttext
\stoptext
</context>
|}
== In titles == See [[Titles#Using_colors_in_chapters_and_sections]] == With frames Changing background color of page ==
For example,
{|
! width="45%"|
|-
| <texcode>
\setuppapersize[A10]
\setupbackgrounds[page][background=color,backgroundcolor=blue]
|
|<context>
\setuppapersize[A10]
\setupcolors[state=start]
|}
{|
\starttext
\tikz\shadecolor[ball color=red!40!yellowhighlight] {Highlighted text in TeX} \startMPcodelabel(0"Highlighted text in MetaPost",0) circle (.15cmorigin) withcolor \MPcolor{highlight};\stoptextstopMPcode
</texcode>
\starttext
\tikz\shadecolor[ball color=red!40!yellowhighlight] {Highlighted text in TeX} \startMPcodelabel(0"Highlighted text in MetaPost",0) circle (.15cmorigin) withcolor \MPcolor{highlight};\stoptextstopMPcode
</context>
|}
Note that `\MPcolor{...}` behaves similar to a `color` primitive in MetaPost. For example, the following is valid MetaPost code.<texcode>color myColor; myColor =Spot colours=0.5[\MPcolor{highlight}, white];</texcode>
</texcode>
|
<context mode=mkiv>
\startlines
\colorcomponents{red}
\transparencycomponents{red}
\processcolorcomponents{red}
\stoplines
</context>
|}
<texcode>
\setupcolors[state=start] \definecolor [blue] [c=1,m=doifcolor{color-name}{...38,y=0,k=if branch .64]\definecolor [yellow] [c=0,m=.28,y=1,k=.06]}\definespotcolor [bluedoifcolorelse{color-100] [blue] [p=1]\definespotcolor [yellow-100] [yellow] [p=1] \definemultitonecolor [combicolor] [blue=name}{... if branch ...}{.12,yellow=.28] [c=.1,m=else branch .1,y=.3,k=.1] \starttext \startcolor[blue]\blackrule[width=3cm,height=3cm]\stopcolor \startcolor[yellow]\blackrule[width=3cm,height=3cm]\stopcolor \startcolor[combicolor]\blackrule[width=3cm,height=3cm]\stopcolor \stoptext}
</texcode>
= Specialized topics =
* [[Color/Palet|Color Palettes]]
* [[Color/Transparency|Transparency]]
* [[Color/Spot_Colors|Spot Colors]]
=Colorizing Grayscale PicturesReferences =
