rgb(X) 19 June 1992 rgb(X) Name rgb - color database compiler Syntax rgb [databasename] < colortextfile Description The rgb program compiles a color database for the X server. colortextfile is the pathname of the text file that describes the names and RGB values for the colors the Xserver will recognize. Usually, /usr/lib/X11/rgb.txt is used as the color text file. If databasename is omitted, rgb generates two database files, /usr/lib/X11/rgb.dir and /usr/lib/X11/rgb.pag. Options databasename is an alternative database name that can include a path. If databasename is specified, databasename.dir and databasename.pag are used instead of the default color database files, /usr/lib/X11/rgb.dir and /usr/lib/X11/rgb.pag. Color database files store the names of colors available to the X server and the corresponding RGB values. By default the Open Desktop X server, Xsco, reads /usr/lib/X11/rgb.dir and rgb.pag. If you run rgb with the databasename option, to create an alternative color database, you must instruct the server to read the alternative database files by running Xsco with the -fr option. Most Open Desktop systems start Xsco from the startx script, but you can pass the -fr option to Xsco through with the following command line: startx -- -fr databasename Color text file format Each line of the colortextfile file consists of three color values and a color name. The color values are decimal numbers from 0 to 255 for the red, green, and blue (``RGB'') components of the color. The following is a typical entry: 35 35 142 Navy Blue This entry defines ``Navy Blue'' as consisting of 35/255ths of the max- imum possible intensity of red, 35/255ths of the maximum possible inten- sity of green, and 142/255ths of the maximum possible intensity of blue. The server is case-insensitive when searching for color names, so ``navy blue'' or ``Navy BLUE'' finds the entry above, for example. The server is sensitive to spaces in color names, so it does not equate ``Navy BLUE'' and ``NavyBLUE.'' Remember that the exact same color values may not produce the exact same shade of that color on different graphics adapters or monitors. To activate changes to rgb.txt, you must recompile the color database with rgb and restart the server. Files /usr/lib/X11/rgb.txt See Also showrgb(X), Xsco(X)