color model

[el Sismógrafo, S.L.]

just to get a couple of things right:

- the RGB Gammuth is wider than the one of CMYK (cmyk uses one color more but 
adds redundancy to the model)
- It is very useful to be able to output cmyk but this implies that:
   - the filters of the supported file formats (especially art/ai) have to be 
modified.
   - screen output still has to be  in RGB so you need something like 
littlecms as a requirement for using Sketch.

- Have a word with the Scribus folks, they have a lot of experience with the 
cmyk issue and Scribus uses cmyk model also for saving color values to files.
Talking about cmyk is talking about a _very_ complex subject.

I think it first has to be clear what Sketch, sorry Skencil, is targeted for 
before major changes to the core are done.