Quote Originally Posted by Tellos Athenaios
Two things.

First: Law & Theory are not the same. Law is about (proven) fact; Theory is about explaining things which arise. Theory doesn't mean fact - in fact it's one of the very few words in the science vocabulary to retain its everyday meaning. Evolution? Theory. Proven? No, not yet.
1+1=2? Law. Proven? Yes. This has been theory for thousands of years!

Second: does aforementioned prey have the ability to see in colour? .... Because if they don't then being pink is much the same as being blue, or being yellow. An optional extra.
There are no natural laws, they are all theories. Hence it is more correct to refer to the theory of gravity than the law of gravity.

The mathematic example you refer to is outside (natural) science, so that's under a different system.