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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>... =
* RGB and CMYK are enabled by default3. If you want only RGB or only CMYK colorTo disable colors in a document, use <tt>cmyk=no</tt> or <tttexcode>rgb\setupcolors[state=nostop]</tttexcode>. 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.
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 colors
* Try the magic <cmd>showcolor</cmd><tt>[xxx]</tt>!To color text, use
{| ! width="25%"| ! width="10%"| ! width="65%"| |- | <texcode>\showcolorcolor[rgbdefined-color]{ ... text ... }</texcode>|| <context>\setupcolors[state=start]\showcolor[rgb]</context>|}
== Defining colors: <cmd>definecolor</cmd> ==or
\definecolor[blablue][r=.25, g=.1, b=1, c=1, m=.1, y=0, k=0, s=.2] Here's some Three \color[blabluered]{blue textcool} inbetween!cats
=== Colors with Hexadecimal Numbers ===or
You can also use hexadecimal numers to specify colors. You need to load the '''hex''' color module first:
===Transparent Colors===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 define '''transparent''' colors through setting t, e.g. <tt>t=0.5</tt>. Beware, some PDF viewers and printshops can't handle PDF transparences!
Hans Hagen posted 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 red and blue blocks, while the second is in front of them.
== Defining color schemes: <cmd>definecolorgroup</cmd> and <cmd>definepalet</cmd>==
<cmd>definecolorgroup</cmd><tt>[name][system][values]</tt>
Very interesting feature* To color the section titles red, to be described later... (see manual)use<texcode>\setuphead[color=red]</texcode>
=Choosing a * To color the footnotes red, use<texcode>\setupfootnotes[color scheme=red]</texcode>
There are three basic strategies to select color combinations for a particular designetc.
# Create a color scheme by picking several colors found within the objects to be used (photographs, pictures, etc)
# Create colors derived from those found in the objects to be used
# Create a color scheme based on the message to convey / the psychological effects of color
See for additional help & reference:* [http://colorschemedesigner.com/ colorschemedesigner.com] = Pre- 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)defined colors =
* Use the color name like <tt>[color=blablue]</tt> The following colors are pre-defined in some <tt>\setupConTeXt (see {{src|colo-imp-rgb...</tt> command.* Typeset single text elements with <cmd>color</cmd><tt>[blablue]{nice blue textmkiv}}</tt> or longer sections with <cmd>startcolor</cmd><tt>[blablue] ...</tt> <cmd>stopcolor</cmd>).
=Spot colours=
To produce a file ready for a clean PDF separation process at your print house, start with{| style="text-align:right; padding-right: 20px;"!| Name !! Color !style="width: 80px;"| Name !! Color !style="width: 100px;"| Name !! Color !style="width: 100px;"| Name !! Color|-|black||bgcolor="#000"| |white||bgcolor="#FFF"| |-|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="#00FFFF" | | ||bgcolor=| |middlecyan||bgcolor="#00CCCC" | |darkcyan||bgcolor="#006666" | |-|magenta||bgcolor="#FF00FF" | | ||bgcolor=| |middlemagenta||bgcolor="CC00CC" | |darkmagenta||bgcolor="660066" | |-|yellow||bgcolor="#FFFF00" | | ||bgcolor=| |middleyellow||bgcolor="CCCC00" | |darkyellow||bgcolor="666600" |
<cmd>setupcolors</cmd><tt>[rgb=no,cmyk=yes,spot=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 - this is important for some types of commercial printing.== X11 Colors ==
Then define your In addition to the above basic spot colourcolor, ConTeXt also includes a definition of the [http://www.w3.org/TR/2002/WD-css3-color-20020219/#x11-color X11 colors]. Note that the name cannot contain spaces or numbers To load this list (but we come to that later{{src|colo-imp-xwi.mkiv}}):, use
Now you can define This loads the tints of this ink that you are actually going to use in your document. Let's say you'll have a 100% for headingsfollowing additional colors:
<cmd>definespotcolor</cmd><tt>[MyBlue][PantoneTwoNineFour][p{| style=1]</tt>"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"| |}
And then a 20% tint for nice display boxes:== Additional pre-defined colors ==
<cmd>definespotcolor</cmd><tt>[MyBlueTint][PantoneTwoNineFour][p=In addition to the above, there are two other sets of pre-defined colors.2]</tt>
And now you can happily use these named colours:{| class="wikitable"| x11 || <code>\usecolors[x11]</code>| {{src|colo-imp-x11.mkiv}}| 658 extended Xorg color keywords (WWW), defined in hex RGB|-| crayola || <code>\usecolors[crayola] </code> | {{src|colo-imp-crayola.mkiv}} || 235 Crayola (Binney & Smith) colors|-| ema || <code>\usecolors[ema]</code>| {{src|colo-imp-ema.mkiv}} || 549 Emacs colors|-| RAL || <code>\usecolors[ral]</code>| {{src|colo-imp-ral.mkiv}} || 213 RAL color system (Deutsches Institut für Gütesicherung und Kennzeichnung)|-| Solarized || <code>\usecolors[solarized]</code>| {{src|colo-imp-solarized.mkiv}} || 16 solarized colors |}
If you are including graphics made by an external program, you might want to match the colour name used in the graphic with the colour name in your '''ConTeXtNote''' set: The key-up so that only one colour space values are overloaded. For example, <code>h</code> is used in the final file. Unfortunately Pantone names for both HSV model and others tend to have spaces Hex model; <code>s</code> is used for both HSV model and numbers in them, so you need to do a low-level mapping trick from your base name to grayscale model. The distinction is made based on the name you want embedded in presence or absence of the file:<code>v</code> key.
<cmd>doregisterspotcolorname</cmd><tt>{PantoneTwoNineFour}{PANTONE 294 CV}</tt>== Cloning existing colors ==
Now your output file should work beautifully with graphics embedded!You can ''clone'' an existing color using<texcode>\definecolor[new-color][old-color]</texcode>
As an update to the above description on defining spot colours, you can now 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 fileThis is a \important{important}word. For example:
% Define tints of spot colours to be used in document for colouring text\definespotcolor definecolor[DarkBluehighlight] [PantoneThreeZeroEightlavenderblush] [p=1]This is a \important{important}word.</context>|}
\definespotcolor [LightBlue] [PantoneTwoNineEight] [p=1]</texcode>= Adapting existing colors ==
(Tested only on minimal Linux distribution dated 31 Aug 2005 - can others confirm {{todo | add details about 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 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. = Advanced Usage =
For example, if your original graphic is an EPS file containing the following lines:== Changing color of entire document ==
%%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)To change the main text color of the document use
and you convert this to a PDF using <tttexcode>ps2pdf\setupcolors[textcolor=defined-color]</tttexcode> 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>For example,
Note how the space characters in the colour name are now encoded as '#20', but the colour names are essentially identical between the original EPS graphic, the new PDF graphic and your {| ! width="45%"| ! width="10%"| ! width="45%"||-|<texcode>\setupcolors[textcolor=blue]\starttexttext.\stoptext</texcode>||<context mode=mkiv>\setupcolors[textcolor=blue]\starttexttext\stoptext</context>|}
A good way == Changing background color of testing colour separation if you don't have access to expensive pre-flight PDF validation tools is to use the following GhostScript command:page ==
gs \ -dBATCH \The background color of the page can be changed using -dNOPAUSE <texcode>\ -sDEVICEsetupbackgrounds[page][background=tiffsep \ -dDOINTERPOLATE \ -dTextAlphaBitscolor,backgroundcolor=4 \ defined-dGraphicsAlphaBits=4 \ -sOutputFile=output.tif \ -r120 \ -MaxSeparations=8 \ input.pdfcolor]</texcode>
This renders a PDF file <tt>input.pdf</tt> as a set of TIFF files:
output.tif - Composite including CMYK approximations to spot coloursFor example,{| ! width="45%"| output.tif.Black.tif - K channel ! width="10%"| output.tif.Cyan.tif - C channel ! width="45%"| output.tif.Magenta.tif |- M channel output.tif.Yellow.tif - Y channel | <texcode> output.tif.s0.tif - Pantone 308 CV\setuppapersize[A10] output.tif.s1.tif - Pantone 298 CV\setupbackgrounds[page][background=color,backgroundcolor=blue]
Hans wrote on the mailinglist on 2004-12-27 about handling of multitone colors:\setupbackgrounds[page][background=color,backgroundcolor=blue]
Currently it's done by pdftools.rb\starttexttext\stoptext</context>|}
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:
<texcode>
\setupcolors[state=start]
\definecolor [blue] [c=1,m=.38,yUsing colors in MetaPost =0,k=.64]\definecolor [yellow] [c=0,m=.28,y=1,k=.06]
\startcolor[combicolor]\blackrule[width=3cm,height=3cm]\stopcolor
\stoptext</texcode>(The CMYK color spec is the fall back color used on screen; one can preview separations == Using colors in full Acrobat 7.)TikZ ==
=Colorizing Grayscale Pictures=To view pre-defined colors, you can use {{cmd|showcolor}}. For example, to see all the colors defined in {{src|colo-imp-x11.mkiv}}, use (output truncated for display here ...)
Another sample by Hans (mailing list 2005{| |-11-16) demonstrates a lot of different possibilities:|<texcode>\showcolor[x11]</texcode>|<context mode=mkiv>\startTEXpage[height=5cm]\showcolor[x11]\stopTEXpage</context>|}
<texcode>\setuplayout[header=0ptIf you use {{cmd|showcolor}} without any argument,footer=0pt,width=middle,height=middle,backspace=1cm,topspace=1cm]\setupcolors[state=start]all currently defined colors are shown.
\startbuffer\definecolor [blue] [c=1, m=.38, yView specific defined colors =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]To view the components of a defined color, you can use:
\definemultitonecolor [combicolor-b] [blue=1] [c=1For example, m=.38, y=0, k=.64] % force multitone\definemultitonecolor [combicolor-y] [yellow=1] [c=0, m=.28, y=1, k=.06] % force multitone
\startbaselinecorrection* {{cmd|colorcomponents}}\startcombination[4*1] {\externalfigure[demo-a]{cmd|transparencycomponents} {no color} * {{\externalfigure[demo-a][color=combicolor]cmd|processcolorcomponents} {indexed duotone} <texcode>\colorcompoents{\externalfigure[demodefined-a][color=combicolor-b]} \tranparencycomponents{spot defined-color} \processcolorcomponents{\externalfigure[demo-a][color=combicolordefined-y]} {spot color}\stopcombination\stopbaselinecorrection</texcode>
\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][Testing if coloris defined =yellow-100]} {spot color}\stopcombination\stopbaselinecorrection
\startbaselinecorrection\startcombination[4*1] {\externalfigure[demo-b]} {no To test if a 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\stopbufferis defined, use
\getbuffer \typebuffer* {{cmd|doifcolor}}* {{cmd|doifcolorelse}}
See "* [http://paletton.com Paletton] - Website to choose color palettes* [http://colorbrewer2.org/ ColorBrewer] - website to choose colors for maps and graphics. * Tina Sutton, Bride M Whelan: The Complete Color and Background" Harmony. Rockport Publishers (2004). ISBN 978-1592530311 (recommanded in the manualmailing list) {{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 Colors=red]</texcode>Using colors with ConTeXt is easy:and then use <code>\important{important text}</code> in the text.
2. Colors are not enabled by default in MkII. To enabled colors in MkII, use<texcode>\setupcolors[state== Choosing a color model ==start]</texcode>
== Using predefined colors: <cmd>setupcolor</cmd> =Basic Usage =
<cmd>definecolor</cmd><tttexcode>\startcolor[blabluedefined-color][r= ...1, g=text .1, b=1, c=1, m=.1, y=0, k=0, s=.2]\stopcolor</tttexcode> (definition for RGB, CMYK and Grey!)
where <code>defined-color</code> is a color defined using {{cmd|definecolor}}. For example, <code>red</code> is one of the predefined colors. So, we can use:
{|
|-
| <texcode>
</texcode>
|
| <contextmode=mkiv>\setupcolors[state=start]starttext\definecolor[blablue][r=.1, g=.1, b=1, c=1, m=.1, y=0, k=0, s=.2] Here's some Three \color[blabluered]{blue textcool} inbetween!cats\stoptext
</context>
|}
{|
! width="45%"|
|-
| <texcode>
\setupcolorstarttext\startcolor[hexred]\definecolor[salmon][h=AB5757]input tufte\stopcolorHey, \color[salmon]{look at that!}stoptext
</texcode>
|
|<contextmode=mkiv>\setupcolorssetuppapersize[state=startA5]\setupcolorstarttext\startcolor[hexred]\definecolor[salmon][h=AB5757]input tufte\stopcolorHey, \color[salmon]{look at that!}stoptext
</context>
|}
{|
|-
| <texcode>
Three \definecolor [transparentred] colored[r=1,t=.5,a=1]\definecolor [transparentblue] [b=1,t=0.5,a=1]\definecolor [solidyellow] [y=1,t=1,a=1] \starttext \startTEXpageThis is some sample text that goes behind the rectangles\hskip-8cm\blackrule[width=2cm,height=1cm,depth=1cm,colorg=solidyellow]\hskip-0.67cm\blackrule[width=2cm8,height=2cm,color=transparentred]\hskip-0.67cm\blackrule[width=2cm,height=1cm,depth=1cm,colorb=transparentblue]\hskip-0.67cm\blackrule[width=2cm,height=2cm,color=solidyellow8]\hskip2cm.\stopTEXpage \stoptext{colorful} cats
</texcode>
|
|<contextmode=mkiv>\setupcolors[state=start]\definecolor [transparentred] [r=1,t=.5,a=1]\definecolor [transparentblue] [b=1,t=.5,a=1]\definecolor [solidyellow] [y=1,t=1,a=1]
\starttext
Three \startTEXpageThis is some sample text that goes behind the rectangles\hskip-8cm\blackrulecolored[widthr=2cm,height=1cm,depth=1cm,color=solidyellow]\hskip-0.67cm\blackrule[width=2cm1,heightg=2cm,color=transparentred]\hskip-0.67cm\blackrule[width=2cm8,heightb=1cm,depth=1cm,color=transparentblue]\hskip-0.67cm\blackrule[width=2cm,height=2cm,color=solidyellow8]\hskip2cm.\stopTEXpage{colorful} cats
\stoptext
</context>
|}
'''Note'''. There is no need to use the color commands directly. Almost all ConTeXt commands accept a <cmdcode>definepaletcolor</cmdcode>key, and you can use <ttcode>[palettename][colorname1=groupcolor:1, colorname2color=groupcolor:2, ...]defined-color</ttcode>. For example,
=Using Colors= Default pre-defined colors ==
<cmdtexcode>definecolor</cmd><tt>[PantoneTwoNineFour]\usecolors[c=1,m=.56,y=0,k=.18xwi]</tttexcode>
= Defining New Colors = New colors may be defined in the following ways {| class="wikitable"! Name !! Syntax (and Example) !! Explanation|-| style="width:20%;" | RGB color model| style="width:40%;" | <texcode>\definecolor[...][r=..., g=..., b=...]</texcode> For example,<texcode>\starttextdefinecolor[lime][r=0.75, g=1, b=0] This is \color[MyBluelime]{Interestinga 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>\stoptextdefinecolor[...][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).|}
For example{|| width==Using the 'e' key to "45%"| <texcode>\usecolors[xwi]\definecolor to specify a spot colour name with spaces[highlight][yellow]\defineframed [important] [location=low, frame=off, background=color, backgroundcolor=highlight]
\definecolor[highlight][lavenderblush]This is a \important{important}word.</texcode>| width="10%"|| width="45% Define spot colours using 'e"| <context mode=....' to specify colour names to use in output filemkiv>\usecolors[xwi]\definecolor[highlight][yellow] \defineframed[PantoneThreeZeroEightimportant] [c=1,mlocation=.05low,yframe=0off,k background=.47color,ebackgroundcolor=PANTONE 308 CVhighlight]
This is a \definecolor [PantoneTwoNineEight] [c=important{important}word.69,m=.07,y=0,k=0,e=PANTONE 298 CV]
\starttexttext\stoptext</texcode>||<context>\setuppapersize[A10]\setupcolors[state=Multitones=start]
A color defined in TeX is available in MetaPost using `\definespotcolor [blue-100] [blue] [p=1]\definespotcolor [yellow-100] [yellow] [p=1]MPcolor{...}`. For example:
{||-|<texcode>\definemultitonecolor definecolor[combicolorhighlight] [bluer=0.128,yellowg=0.288,b=0] \starttext\color[c=.1,m=.1,y=.3,k=.1highlight]{Highlighted text in TeX}
\startMPcode
label("Highlighted text in MetaPost", origin)
withcolor \MPcolor{highlight};
\stopMPcode
</texcode>
|<context mode=mkiv>
\definecolor[highlight][r=0.8,g=0.8,b=0]
\starttext
\color[highlight]{Highlighted text in TeX}
\startcolor[blue]startMPcodelabel("Highlighted text in MetaPost", origin) withcolor \blackrule[width=3cm,height=3cm]MPcolor{highlight};\stopcolorstopMPcode</context>|}
Note that `\startcolorMPcolor{...}` behaves similar to a `color` primitive in MetaPost. For example, the following is valid MetaPost code.<texcode>color myColor; myColor = 0.5[yellow]\blackrule[width=3cmMPcolor{highlight},height=3cmwhite]\stopcolor;</texcode>
= Viewing pre-defined color =
== View all defined colors ==
* {{cmd|showcolorcomponents}}<texcode>\definemultitonecolor showcolorcomponents[combicolor] [blue=.12, yellow=.28] [c=.color-1, m=.1, y=.3, k=.1color-2]</texcode>
{| |-|<texcode>\useexternalfigureshowcolorcomponents[demo-a][mill.png] [object=nored,middlered, width=.2\textwidthdarkred]</texcode>|<context mode=mkiv>\useexternalfigureshowcolorcomponents[demo-b][hacker-bw.jpg][object=nored,middlered, width=.2\textwidthdarkred]</context>|}
For example,{||-|<texcode>\startbaselinecorrectionstartlines\startcombination[4*1]colorcomponents{red} \transparencycomponents{red}\externalfigure[demo-b]} processcolorcomponents{no colorred} {\externalfigure[demo-b][colorstoplines</texcode>|<context mode=combicolor]} mkiv>\startlines\colorcomponents{indexed duotonered} {\externalfigure[demo-b][color=combicolor-b]} transparencycomponents{spot colorred} {\externalfigure[demo-b][color=combicolor-y]} processcolorcomponents{spot colorred}\stopcombinationstoplines</context>\stopbaselinecorrection|}
Usage: <texcode>\stoptextdoifcolor{color-name}{... if branch ... }\doifcolorelse{color-name}{... if branch ...}{... else branch ...}
</texcode>
= Specialized topics =
* [[Color/Palet|Color Palettes]]
* [[Color/Transparency|Transparency]]
* [[Color/Spot_Colors|Spot Colors]]
= References =
