At the time of writing, 'Test Patterns' offers five video check patterns: '3840 x 2160 pixels, 59.94 fps', 'HDR10, 3840 x 2160 pixels, 29.07 fps', 'Dolby Vision, 3840 x 2160 pixels, 30 fps ...

Dolby Vision takes that up a notch with 12 bits, for a maximum of 68.7 billion colors. While TVs that can handle 10-bit color are quite common, there are no TVs that support 12-bit color yet.