RGBColor[red, green, blue] is a graphics directive which specifies that graphical objects which follow are to be displayed, if possible, in the color given.
Red, green and blue color intensities outside the range 0 to 1 will be clipped.
On monochrome displays, a gray level based on the average of the color intensities is used.
See Section 2.10.3.
See also: Hue, GrayLevel, CMYKColor, ColorOutput.
Related package: Graphics`Colors`.
New in Version 1.