vRecall that colors
are created on the screen with a combination of three colors of light --
red, green, blue
vWhen drawing, one
can specify the exact color by calling a procedure, RGB( , , ) whose three
parameters
are the contribution of the three colors in the range 0 -- 255
oRGB(0, 0, 0)
oRGB(255, 0, 0)
oRGB(0, 255, 0)
oRGB(0, 0, 255)
oRGB(255,255,255)