How do predators influence guppy coloration?

Guppies become colorful which is bad because it attracts predators so the more bright and colorful a colony is the less amount of Guppies are going to be there. If they are drab then there are going to be hardly any bright guppies and only the drab ones. Coloration would be from the guppies trying to adapt to survive get the drabbest color they can be in order to survive so the predators influence is going to be there are going to be a high amount guppies in a colony if it has for example 30 Rivulus. But if they're more types of predators like Acara's and Cichlid's they're going to be no bright guppies only drab.