Additive color mixing: adding red to green will yield yellow; adding yellow to blue will yield white. |
One common application of the RGB color space to display computer graphics on a monitor. For each pixel in the image, independent values for red, green and blue are stored. There is a fixed range of red, green and blue intensities displayable by the computer monitor, but by choosing the appropriate combination of red, green and blue light, one can stimulate in the human eye the perception of many of the colors between the black level and white point of the monitor being used to display the image. Typically the values stored vary between zero and 255.
As an example:
It is important to note that the intensity of the color output on computer display devices isn't always linear. That is, even though a value of 127 is very close to halfway between zero and 255, the color output of a computer display device when displaying (127, 127, 127) is significantly lower than halfway between the black level[?] and white point[?] of your monitor. This is because most display devices have a gamma characteristic different from 1 (i.e. the behavior of most display devices is, unfortunately, not linear in the relationship between color value and output intensity), and require gamma correction.
In HTML the hexadecimal color coding is used. The table below shows some of the possible colors with their color codes:
000000 | 000033 | 000066 | 000099 | 0000CC | 0000FF |
330000 | 330033 | 330066 | 330099 | 3300CC | 3300FF |
660000 | 660033 | 660066 | 660099 | 6600CC | 6600FF |
990000 | 990033 | 990066 | 990099 | 9900CC | 9900FF |
CC0000 | CC0033 | CC0066 | CC0099 | CC00CC | CC00FF |
FF0000 | FF0033 | FF0066 | FF0099 | FF00CC | FF00FF |
003300 | 003333 | 003366 | 003399 | 0033CC | 0033FF |
333300 | 333333 | 333366 | 333399 | 3333CC | 3333FF |
663300 | 663333 | 663366 | 663399 | 6633CC | 6633FF |
993300 | 993333 | 993366 | 993399 | 9933CC | 9933FF |
CC3300 | CC3333 | CC3366 | CC3399 | CC33CC | CC33FF |
FF3300 | FF3333 | FF3366 | FF3399 | FF33CC | FF33FF |
006600 | 006633 | 006666 | 006699 | 0066CC | 0066FF |
336600 | 336633 | 336666 | 336699 | 3366CC | 3366FF |
666600 | 666633 | 666666 | 666699 | 6666CC | 6666FF |
996600 | 996633 | 996666 | 996699 | 9966CC | 9966FF |
CC6600 | CC6633 | CC6666 | CC6699 | CC66CC | CC66FF |
FF6600 | FF6633 | FF6666 | FF6699 | FF66CC | FF66FF |
009900 | 009933 | 009966 | 009999 | 0099CC | 0099FF |
339900 | 339933 | 339966 | 339999 | 3399CC | 3399FF |
669900 | 669933 | 669966 | 669999 | 6699CC | 6699FF |
999900 | 999933 | 999966 | 999999 | 9999CC | 9999FF |
CC9900 | CC9933 | CC9966 | CC9999 | CC99CC | CC99FF |
FF9900 | FF9933 | FF9966 | FF9999 | FF99CC | FF99FF |
00CC00 | 00CC33 | 00CC66 | 00CC99 | 00CCCC | 00CCFF |
33CC00 | 33CC33 | 33CC66 | 33CC99 | 33CCCC | 33CCFF |
66CC00 | 66CC33 | 66CC66 | 66CC99 | 66CCCC | 66CCFF |
99CC00 | 99CC33 | 99CC66 | 99CC99 | 99CCCC | 99CCFF |
CCCC00 | CCCC33 | CCCC66 | CCCC99 | CCCCCC | CCCCFF |
FFCC00 | FFCC33 | FFCC66 | FFCC99 | FFCCCC | FFCCFF |
00FF00 | 00FF33 | 00FF66 | 00FF99 | 00FFCC | 00FFFF |
33FF00 | 33FF33 | 33FF66 | 33FF99 | 33FFCC | 33FFFF |
66FF00 | 66FF33 | 66FF66 | 66FF99 | 66FFCC | 66FFFF |
99FF00 | 99FF33 | 99FF66 | 99FF99 | 99FFCC | 99FFFF |
CCFF00 | CCFF33 | CCFF66 | CCFF99 | CCFFCC | CCFFFF |
FFFF00 | FFFF33 | FFFF66 | FFFF99 | FFFFCC | FFFFFF |
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