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The color database, based on the RGB color model, provides a predefined set of colors and shades of gray. This database specifies hundreds of different colors, including various shades for some colors. The database also provides 101 shades of gray. This large number of precisely graduated grays provides a wide variety of shading for gray scale screens.
The color database information is stored in compiled format in two files, rgb.dir and rgb.pag, located in the /usr/lib/X11 directory. In the same directory, the rgb.txt file lists all of the database information in ASCII format.
The rgb.txt file lists the name of each color defined in the database, variations on the color names (differing only in spelling, spacing, and capitalization), and the Red, Green, and Blue (RGB) values that are used to create each color. For more information on the RGB color model, see the next section.
To examine the contents of the rgb.txt file, open it with any text editor. The following is a partial listing of the rgb.txt file:
255 250 250 snow 248 248 255 ghost white 248 248 255 GhostWhite 245 245 245 white smoke 245 245 245 WhiteSmoke 220 220 220 gainsboro 255 250 240 floral white 255 250 240 FloralWhite 253 245 230 old lace 253 245 230 OldLace 250 240 230 linen 250 235 215 antique white 250 235 215 AntiqueWhite 255 239 213 papaya whip 255 239 213 PapayaWhip 255 235 205 blanched almond 255 235 205 BlanchedAlmond 255 228 196 bisque
You can also use the showrgb client to display the contents of the color database.
See also: