Binciken launi na launi yana nufin hanyar nazarin sinadarai masu ƙididdigewa wanda ya ƙunshi auna girman launi da wani abu ya samar a cikin bayani. Launi na maganin yawanci saboda kasancewar wani fili mai launi da aka samar ta hanyar amsawa tsakanin abu da ake nazarin abu da reagent. Ƙarfin launi yana daidai da ƙaddamar da abubuwan da ake nazarin, kuma ana iya auna ta ta amfani da launi ko spectrophotometer. Ana amfani da nazarin launi na launi a fannoni kamar su biochemistry, sunadarai na asibiti, nazarin muhalli, da kimiyyar abinci, da sauransu.