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Diffstat (limited to 'doc/user/bgr_colo')
| -rw-r--r-- | doc/user/bgr_colo | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/doc/user/bgr_colo b/doc/user/bgr_colo index 7da8eeb..ca4f019 100644 --- a/doc/user/bgr_colo +++ b/doc/user/bgr_colo @@ -12,7 +12,7 @@ produces @ID grey @Colour { Hello, world } The @Code "@Colour" symbol will accept any of the following colours: @QD @HAdjust @Tab - vmargin { 0.7vx } + vmargin { 0.5vx } hmargin { 0.2c } @Fmta { @Col A @Colour @FilledBox ! @Col @Code A ! @Col ! @Col B @Colour @FilledBox ! @Col @Code B ! @Col ! @@ -32,11 +32,13 @@ The @Code "@Colour" symbol will accept any of the following colours: @Rowb A { black } B { white } } Monochrome output devices will render them as shades of grey. Colouring -something @Code white makes it invisible (unless it is being printed -on a coloured background), which is sometimes useful. +something @Code white makes it invisible (unless printed on a coloured +background), which is sometimes useful. See Appendix {@NumberOf morecolours} +to get many more colour names, using the @Code xrgb include file +and its @Code "@Xrgb" symbol. @PP In addition to the list of colours given above, there is a special -colour called {@Code nochange} which produces whatever colour you already +{@Code nochange} colour which produces whatever colour you already happen to be using; you can also use an empty object to ask for this. And you can get lots more colours by specifying them using numbers, like this: @ID @Code "{ rgb 0.5 0.5 1.0 } @Colour { Hello, world }" @@ -44,8 +46,7 @@ which means use red at intensity 0.5, green at intensity 0.5, and blue at intensity 1.0, producing @ID { rgb 0.5 0.5 1.0 } @Colour { Hello, world } In the strange world of colour coordinates, in which 0 is dark and 1 is -light, this is a light blue. You can also use the CMYK system if you -know what that is: +light, this is a light blue. You can also use the CMYK system: @ID @Code "{ cmyk 0.5 0.5 1.0 1.0 } @Colour { Hello, world }" produces @ID { cmyk 0.5 0.5 1.0 1.0 } @Colour { Hello, world } @@ -53,7 +54,7 @@ Wherever in this document it says that that you can use any colour from this section, it means any of the names above, or {@Code nochange}, or an object beginning with @Code "rgb" or @Code "cmyk" as shown. @PP -Whether or not the colours produced by @Code "@Colour" actually +Whether the colours produced by @Code "@Colour" actually correspond with the names depends on the output device; the same nominal colour can look quite different on screen and on paper. @End @Section |