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This is a list of software palettes used by computers. Systems that use a 4-bit or 8-bit pixel depth can display up to 16 or 256 colors simultaneously. Many personal computers in the early 1990s displayed at most 256 different colors, freely selected by software (either by the user or by a program) from their wider hardware's RGB color palette.
The 3-3-2 bit RGB use 3 bits for each of the red and green color components, and 2 bits for the blue component, due to the human eyes having lesser sensitivity to blue. This results in an 8×8×4 = 256-color palette as follows: This palette is used by: The MSX2 series of personal computers; Palette 4 of the IBM PGC; Extended Graphics Array (XGA)
"Screen 8" 256-color graphic modes (3 bits each of red and green, 2 bits for blue). Fujitsu FM-77 AV 40 (1986) Low 262,144-color and high resolution 8-color graphic modes, from 262,144-color palette (6 bits for each of red, green, and blue). MSX2+ systems (1988) "Screen 10&11" 12,499-color YJK+YAE and "Screen 12" 19,268-color YJK graphic modes
8-bit color, with three bits of red, three bits of green, and two bits of blue. In order to turn a true color 24-bit image into an 8-bit image, the image must go through a process called color quantization. Color quantization is the process of creating a color map for a less color dense image from a more dense image. [2]
Screen mode 6 is a 512×212-pixel mode with a 4-color palette chosen from the available 512 colors. Screen modes 5 and 7 are high-resolution 256×212-pixel and 512×212-pixel modes, respectively, with a 16-color palette chosen from the available 512 colors. Each pixel can be any of the 16 selected colors.
The list of colors was presented as if it had special properties that render it immune to dithering, but on 256-color displays applications could actually set a palette of any selection of colors that they chose, dithering the rest.
If the color palette is jumbled or totally wrong, a green leaf will appear blue, or any other possible color, depending on what that particular color was set for, which particular one out of 256. Due to the way chunks of memory are allocated in such an environment, the bytes in segment 0xA000 from offset 64000 to 64768, can be written to with ...
An adaptive color palette expanding from 2 colors to 256 colors, demonstrating how the image changes (click to see animation) In an application showing many different image thumbnails in a mosaic on screen, the program may not be able to load all the adaptive palettes of every displayed image thumbnail at the same time in the hardware color registers.