Tainted coins are contagious: if you mix tainted coin with non-tainted one result is tainted.

Colored coin is counter-contagious: if you mix colored coin with non-colored one, or with a coin of different color, it loses its color tag, the result is uncolored.

So these things are almost unrelated.

There are existing tools which trace coin taints; "colored coin" tools won't help you with this at all.