Color management

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Revision as of 22:36, 21 November 2003 by NathanHurst (Talk)

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What is "Color"?

That is a very good question. In Inkscape, color is basically RGB value triplets. But in order to get precise, and to enable the same color to be seen on different computers, the general idea of colorspaces comes into play.

A common colorspace for the internet is sRGB. SVG defaults to sRGB.

Then there is CMYK. Of course, this is not a single colorspace, but needs to be specified per output device, inks, media, viewing conditions, etc.

And then there are spot colors. Many designers (and thus users of vector art packages) often specify spot colors that are precise matches from a book, such as Pantone named colors. The main thing about these is that they are supposed to be fixed single colors of a known appearance.

So, off hand it seems that it would be good if Inkscape would support:

  • sRGB color
  • spot color
  • colorspace definition

There are two different problems: firstly, displaying a composite image composed of several spot colours. This is easy - just represent the spot colours with their rgb approximations. the only work is at the interface and solour lookup phase - implementing schemes or palletes solves this straight off. The second problem is generating postscript or png with the colours separated correctly. This is hard.