Thanks for the reply, I tried doing what you said, and indeed I get Colored particles now. However when I render in Hardware, particles that get close to eachother, mix the colors. (I'm using the emitterID from Realflow as ramp UV, there are 2 emitters) and while hardware render gives me some purple particles as they get close to eachother, any other renderer only lets them stay the color that I defined.

Is there another way to do this?