I have some ideas:
-RGB pheromones, so it will have a bigger influence on a bibite the more it has of the color determied by the bibite's brain.
-Sight and sensing precision : the more precise the sight/sensing is, the more the bibite can distinguish a color/odor from another, but the more it will cost energy.
- A "not" hidden node, wich "reverses" the strength of a synapse : a positive value will become a negative one; ect.