Use colour filters on Mac
You can apply a colour filter to adjust the display colours for colour vision deficiencies or to tint the entire screen to make it easier to read text.
On your Mac, choose Apple menu
Select Enable Colour Filters.
Click the “Filter type” pop-up menu, then choose a filter. Colour Tint applies a tint to the entire screen.
For most filters, you can adjust the intensity; as you do, the pencils reflect the change to help you determine the setting that’s right for you. If you choose Colour Tint, click the colour box to choose the colour of the tint.
Colour filters can change the look of items such as images, pictures and movies.
To quickly turn Colour Filters on or off using the Accessibility Shortcuts panel, press Option-Command-F5 (or if your Mac or Magic Keyboard has Touch ID, quickly press Touch ID three times).