How to learn colour

Im tryna learn how to use colour but Im unsure on how to study, I know that I can either start from scratch or study orther people's artworks, and Im going the second route. However the main issue is that While I can see the colours they used, I'm unsure on how to go about recreating it as I don't have thier process. While studying Im wondering if I should try to use overlay and darken inorder to attempt to make a similar effect or try copying the colours they used exactly and see how those colours interact.