Ma'anar ƙamus na kalmar "launi achromatic" yana nufin launi da ba shi da launi ko saturation, kamar baki, fari, ko launin toka. Launi ne wanda ba shi da chromaticity ko hue, kuma galibi ana la'akari da shi a matsayin tsaka tsaki ko kuma ba tare da launi ba. A wasu kalmomi, launukan achromatic sune waɗanda ba su da launi, kawai haske ko inuwa.
