Pigment yog ib yam khoom uas hloov xim ntawm lub teeb pom kev los yog kis tau tus mob raws li qhov tshwm sim ntawm wavelength-selective absorption.Cov txheej txheem ntawm lub cev no txawv ntawm fluorescence, phosphorescence, thiab lwm yam ntaub ntawv ntawm luminescence, uas cov khoom emits lub teeb.Feem ntau cov ntaub ntawv xaiv absorbs tej wavelengths ntawm lub teeb.Cov ntaub ntawv uas tib neeg tau xaiv thiab tsim los siv raws li pigments feem ntau muaj cov khoom tshwj xeeb uas ua rau lawv muaj txiaj ntsig zoo rau kev pleev xim rau lwm cov ntaub ntawv.Cov xim yuav tsum muaj lub zog tinting siab nrog rau cov khoom nws xim.Nws yuav tsum ruaj khov nyob rau hauv cov ntaub ntawv ntawm ambient kub.