system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do we know Dinosaurs weren't purple with yellow polka dots?

Is there any science behind the colors of Dinosaurs, or is it simply speculations?
gpt
Pigments have been found in some fossilised dinosaur feathers,  so we know the colour of a couple of birdlike dinosaurs.

The rest is speculation,  based on the reasoning "if lizards are green and brown now, then they probably were then".