The Online POV-Ray Tutorial
To find the color you need, enter the values in the text field (from
0.0 to 1.0) or slide the scrollbars. The values
in the text fields correspond to the components in a POV-Ray color
For example, if you have found a color you like with a red component of
0.5, a green component of 0.75, and a blue
component of 0.0, the resulting POV-Ray color vector would be
<0.5, 0.75, 0>.
Note that the more colors your terminal can display, the more accurate the
Color Tool will be. If your terminal cannot display many colors,
you may not get an accurate reading. If the square on the left stays black,
you need a better display.