Hello, as you might have guessed, my question revolves around thin film optics. My intention is: Given a two thin-film system residing on top of a semi-infinite (bulk) layer, how can I estimate the reflecting color (RGB preferably) when illuminated by white light? (Illustrated below). I obviously have omitted much of the specific information such as material, constants, etc (this isn't even my entire problem). I am not looking for an explicit answer, rather I'd like to be pointed in the right direction or some resource of where to start (Optics isn't really a strong suit of mine).