RGB

• The computer's native color space and the system for capturing and displaying color images electronically.
• All TV, computer and electronic display screens create color by generating red, green and blue (RGB) lights.

What is CMYK (Cyan Magenta Yellow Black)

• In the print industry, cyan, magenta, yellow and black are used as the primary colors. When you mix all the colors, the result is gray.

Comparision of RGB and CMYK

RGB colors in displays

1-bit black and white displays

• In the simplest form of black-and-white computer displays, a single bit of memory is assigned to each pixel.
• Because each memory bit is either positive or negative (0 or 1), a 1-bit display system can manage only two colors (black or white) for each pixel on the screen.

8-bit or 256 colors displays

• When 8 bits of memory are dedicated to each pixel, each pixel could be one of 256 colors. (2 power of 8 is 256 unique color combinations) This kind of computer display is called an "8-bit" or "256-color" display, and is common on older laptop computers and desktop machines.

24-bit or True color displays

• "True-color" or "24-bit" color displays can show millions of unique colors simultaneously on the computer screen.
• True-color images are composed by dedicating 24 bits of memory to each pixel; 8 each for the red, green, and blue components (8 + 8 + 8 = 24).