Color GamutSince the dawn of desktop publishing, it’s been unquestioned that Thou Shalt Convert to CMYK. Those who submitted RGB files were considered uninformed, even uncivilized.

So what’s the difference between CMYK and RGB? CMYK vs. RGB at CreativePro has the quick answer.

For what it’s worth, I haven’t converted a file to CMYK in a long time. Since virtually everything I design ends up leaving my computer as a PDF/X-1a, I have InDesign convert to CMYK in the PDF-making process. You should note that this only works if you have a fully color managed workflow.