You can now mix colors with prodatum! check the changelog and this screenshot for more. and while you are at it you may also want to check the little icon in the upper right corner of this site. “) Janus, 14.1.2011
Crashing for me on Win7, but looks very promising. If anyone knows how to compile, maybe you could oblige and post the binary??
For now I will stick with Proteum. Not perfect, often frustrating, but definitely more stable.