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=>     R0 =     hue, 0 to 360
     R1 =     saturation
     R2 =     value

<=     R0 =     red component
     R1 =     green component
     R2 =     red component

This call converts the colour passed as HSV values to RGB values. It will generate an error for hue = staturation = 0.

See PRM 3, page 381.

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