[Kaijo]

The addon you're referring to is already available: https://github.com/rlguy/Blender-FLIP-Fluids/wiki/Mixbox-Ins...

It works as a kind of experimental extension supplied with the paid FLIP Fluids addon. Note that the fluid solver built into Blender is also an implementation of FLIP, but "FLIP Fluids" is a separate product. I've played with fluid simulation in Blender quite a bit. The bundled FLIP is very limited, FLIP Fluids is great, and the color mixing is amazing!

[amarcheschi]

Oh, I thought it was referring to the free blender implementation. Cool nonetheless