make-rgb

Arguments: &key red green blue scratch-rgb

Returns an rgb color object with the specified values of red, green, and blue. All arguments should be integers between 0 and 255. All default to 0.

If the scratch-rgb argument is specified, it should be a rgb object (such as created by make-rgb) which will be modified to have the new red, green, and blue values. This avoids consing a new rgb object and is particularly useful when many colors are created, used temporarily, and discarded.

Note that the value of color properties (such as background-color and foreground-color) must be RGB color objects, as made with make-rgb. If you use HLS colors, you should apply the function hls-to-rgb to an HLS color before setting a color property to it. You can use the function rgb-to-hls to get the HLS equivalent of an RGB color.

See also make-hls, hls-to-rgb, rgb-to-hls, and rgb-blue, rgb-red, rgb-green, rgb-equal, rgb-p, and rgb.

And see cg-color-palettes.htm.

A number of RGB objects are pre-defined as the values of the following symbols:

• black
• white
• gray
• dark-gray
• light-gray
• red
• dark-red
• light-red
• green
• dark-green
• light-green
• blue
• dark-blue
• light-blue
• cyan
• dark-cyan
• light-cyan
• magenta
• dark-magenta
• light-magenta
• yellow
• dark-yellow
• light-yellow

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.