CMYK colours

[ul]

Hi all,

I just came across the issue of printing coloured scores and wondered if 
it's possible to use CMYK colours in LilyPond. From what the NR says 
this seems impossible but I wanted to ask anyway.

If it is *not* possible, what would be - theoretically - the complexity 
of adding support for that?
It might be rather straightforward to provide a conversion function in 
Scheme (ignoring the issue of colour profiles), but I'm talking of 
native support.

Urs