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If the color in the top layer is less than fully opaque (alpha < 255), the color from underlying layers "shows through". In the RGB model, hues are represented by specifying one color as full intensity (255), a second color with a variable intensity, and the third color with no intensity (0).
Systems with an 18-bit RGB palette use 6 bits for each of the red, green, and blue color components. This results in a (2 6) 3 = 64 3 = 262,144-color palette as follows: 18-bit RGB systems include the following: IBM 8514, MCGA, VGA for IBM PC compatibles (256 colors out of 262,144) Atari Falcon (256 colors) Nintendo DS (3D output and 2D blended ...
RGB values are usually given in the 0–255 range; if they are in the 0–1 range, the values are multiplied by 255 before conversion. This number divided by sixteen (integer division; ignoring any remainder) gives the first hexadecimal digit (between 0 and F, where the letters A to F represent the numbers 10 to 15.
The number in each position ranges from 0 (no color added) to 255 (100% color added). This range was chosen because it is the most commonly used in computer color selection dialogs. (The numbers 0 through 255 fit naturally within one byte and are therefore used to directly drive graphics cards.) Most image editing programs accept this range.
On a typical standard 2.2-gamma CRT display, an input intensity RGB value of (0.5, 0.5, 0.5) only outputs about 22% of full brightness (1.0, 1.0, 1.0), instead of 50%. [19] To obtain the correct response, a gamma correction is used in encoding the image data, and possibly further corrections as part of the color calibration process of the device.
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The first recorded use of champagne as a color name in English was in 1915. [18] Eggshell ... [0–255] (byte) The color flax is displayed at left.
B: Normalized to [0–255] (byte) Light blue is a color or range of colors, typically a lightened shade with a hue between cyan and blue . The first use of "light blue" as a color term in English is in the year 1915.