[desktopninja]

Respectfully, mixing colors in lifeforms is not as binary as "purple (blue+red) and lime (green+yellow)". A black rose and a white rose does not produce a gray rose. A black cat and a white cat will not give gray cat. Two black dogs can give you a gray dog with blue eyes.

[ttt0]

If each color represents a particular heritable trait then it's more or less like that.