This current rgb.txt file contains 752 entries, with 232 duplicate
names, yielding 520 unique colors. Here is a sample of some of the 87 blues:
240 248 255 AliceBlue
25 25 112 MidnightBlue
100 149 237 CornflowerBlue
70 130 180 SteelBlue
176 196 222 LightSteelBlue
173 216 230 LightBlue
176 224 230 PowderBlue
138 43 226 BlueViolet
The first three fields in each line are the red, green, and blue components, each
expressed as a fraction of 255 (24-bit color)??”so 255 255 255 is white, and 0 0 0 is
black.
3.14
3.14 Configuring a Monitor??™s Scan Rates 59
Some colors have numbered variations:
135 206 255 SkyBlue1
126 192 238 SkyBlue2
108 166 205 SkyBlue3
74 112 139 SkyBlue4
202 225 255 LightSteelBlue1
188 210 238 LightSteelBlue2
162 181 205 LightSteelBlue3
110 123 139 LightSteelBlue4
And there??™s also 100 shades of gray (spelled gray as well as grey) numbered from 0
(black) to 100 (white):
0 0 0 gray0
0 0 0 grey0
3 3 3 gray1
3 3 3 grey1
...
252 252 252 gray99
252 252 252 grey99
255 255 255 gray100
255 255 255 grey100
You can add colors to this file, but it??™s not recommended??”using custom color
names is not portable. However, you??™re free to use any of these color names anywhere
that a color code is needed, such as for a background color for the screen, and
you can be confident that the name will be recognized by any X server.
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