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Most 8-bit image formats store a local image palette of 256 colors in addition to the raw image data. This second form is often called 8-bit truecolor, as it does not use a palette at all, and is thus more similar to the 15-bit, 16-bit, and 24-bit truecolor modes. The other form is where the 8 bits directly describe red, green, and blue values, typically with three bits for red, three bits for green and two bits for blue.
RED 8 BIT S PROFESSIONAL
Some older cards prior to the VGA (like the Professional Graphics Controller) can only choose the 256-color palette from 4,096 colors (12 bits: 4 red, 4 green, 4 blue). But in the original VGA card’s 320×200 mode, 256 on-screen colors could be chosen from a palette of 262,144 colors (18 bits: 6 red, 6 green, 6 blue). In most color maps, each color is usually chosen from a palette of 16,777,216 colors (24 bits: 8 red, 8 green, 8 blue). The most common uses a separate palette of 256 colors, where each of the 256 entries in the palette map is given red, green, and blue values. There are two forms of 8-bit color graphics.
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The maximum number of colors that can be displayed at any one time is 256. 8-bit color graphics is a method of storing image information in a computer’s memory or in an image file, such that each pixel is represented by one 8-bit byte.