A color measurement apparatus includes an opening portion forming member that is a member in which an opening portion for causing light arriving from a measurement target to enter inside the apparatus is formed, and that is arranged on a bottom surface at a time of measurement performed by the apparatus, an incident light processing portion that processes light incident through the opening portion, a shutter unit that is a unit configured to be displaced between a closed position at which the opening portion is covered, and an open position at which the opening portion is open, and that includes a reflection reference surface used as a reference of reflectance at a position facing the opening portion, and a detection section that detects changes in a detection signal to be output in accordance with displacement of the shutter unit.