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A color in the RGB color model is described by indicating how much of each of the red, green, and blue is included. The color is expressed as an RGB triplet (r,g,b), each component of which can vary from zero to a defined maximum value. If all the components are at zero the result is black; if all are at maximum, the result is the brightest ...
However, switching to a white and black color set, instead of a muddy gray as expected, the result is either orange or blue. Reversing the order of the alternating dots will give the opposite color. In effect, the 256x192 two color mode becomes a 128×192 four color mode with black, orange, blue, and white available.
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)
When an older monochrome original Game Boy game cartridge (Type 1) is plugged-in, the Game Boy Color first tries to apply a palette from a hard-coded game list in the device's ROM. If the system does not have a palette stored for a game, it defaults to the "Dark green" palette (see below). The player can also choose one of 12 false color palettes.
Areas with blue color in it appear bright and those without blue color appear dark or black. A blue color with RGB values of 0 0 255 therefore appears bright. A red area (255 0 0) or a green surface (0 255 0) appears black. Below - or in some test images above - the color bars are reference areas, that serve as an indication for a proper ...
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The upper 48 KiB of each plane remains unused in this mode. Unlike SVGA and higher color depths, Mode 13h, part of the MCGA set of video modes, has 18 bits of color, 6 per RGB channel. The color palette data is not stored in memory per se, but rather modified, read and written to by low level I/O port calls, to the DAC registers.
Color management is necessary because different devices have different color capabilities and characteristics. For example, a monitor may display colors differently than a printer can reproduce them. Without color management, the same image may appear differently on different devices, leading to inconsistencies and inaccuracies.