Calibrate your Mac display
How you perceive the colours on your display can be affected by many factors, such as ambient light, the position and angle of the display, and the age of the display. To accommodate for these factors, you can adjust your display using Display Calibrator Assistant.
Note: Calibrating your display isn’t usually necessary for a Mac in a typical home or office environment.
On your Mac, choose Apple menu > System Preferences, click Displays, then click Colour.
Display Calibrator Assistant walks you through adjusting your display, then creates a calibrated colour profile. The number of adjustments in the calibration process varies depending on the type of display.
When the display profile is ready, it’s automatically assigned as your display’s colour profile.
Some displays have additional built-in colour accuracy and calibration features. See the documentation that came with your display.