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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.
Fixed 16-color palette (1 bit each of red, green, blue, and brightness, with bright white replaced by orange), with 2 colors per block on an 8×1 pixel attribute grid. Commodore Plus/4 (1984) Multicolor and High resolution 16-color graphic modes, from 121-color master palette (black and 15 hues by 8 luminosity levels). Amstrad CPC (1984)
The 4-bit RGBI palette is similar to the 3-bit RGB palette but adds one bit for intensity. This allows each of the colors of the 3-bit palette to have a dark and bright variant, potentially giving a total of 2 3 ×2 = 16 colors. However, some implementations had only 15 effective colors due to the "dark" and "bright" variations of black being ...
ColorBrewer is an online tool for selecting map color schemes based on palettes created by Cynthia Brewer. [1] It was launched in 2002 by Brewer, Mark Harrower, and The Pennsylvania State University. Suggested color schemes are based on data type (sequential, diverging, or qualitative).
The 4-bit RGBI palette is similar to the 3-bit RGB palette but adds one bit for intensity. This allows each of the colors of the 3-bit palette to have a variant (on most machines dark or bright, but saturated or unsaturated was also possible) potentially giving a total of 2 3 ×2 == 16 colors. Some implementations had only 15 effective colors ...
The Atari ST series has a digital-to-analog converter of 3-bits, eight levels per RGB channel, featuring a 9-bit RGB palette (512 colors).Depending on the (proprietary) monitor type attached, it displays one of the 320×200, 16-colors and 640×200, 4-colors modes with the color monitor, or the high resolution 640×400 black and white mode with the monochrome monitor.
The color that was drawn if the bit was a 1 or a 0 was selected from a pre-defined palette of up to 128 colors (see below) and held in other registers. The TIA also supported five separate graphics objects consisting of: Two 8-pixel horizontal lines which make up the 'sprites' Player 1 and Player 2. These are single color, can be stretched by a ...
The values read from the threshold map should preferably scale into the same range as the minimal difference between distinct colors in the target palette. Equivalently, the size of the map selected should be equal to or larger than the ratio of source colors to target colors.