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hraath t1_jcm1pvl wrote on March 17, 2023 at 8:27 PM

Reply to comment by TheSimpleHumans in What decides which wavelength to reflect and which one to be absorbed in an object? by TheSimpleHumans

The keyword for this is "chromaphore", if you want to dig deeper. This will take you to molecular orbital theory, that is the description of the energetic states of electrons in molecules.