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RGB()
Mix a colour from red, green and blue components
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Syntax
RGB( <nRed>, <nGreen>, <nBlue> )   -->   nColour

Arguments
<nRed>, <nGreen>, <nBlue> are integers in the range 0 to 255
representing the amount of each colour to be used in the new
colour.  (Zero (0) represents none of the colour.)

Returns
A number representing the desired colour is returned.

Description
RGB() is actually a macro, but is used like a function.

Example
nBlack = RGB( 0, 0, 0 )
nWhite = RGB( 255, 255, 255 )
nRed = RGB( 255, 0, 0 )