You can define a color as a tuple with 3 color values representing red, green, and blue. This is know as “RGB”. RGB stands for Red, Green, and Blue. We specify how much red, green, and blue to use by a number range of 0-255. No light is zero. Turn the light on all the way on and it is 255. We need three numbers to specify three colors, so (0, 0, 0) means no red, no green, no blue -- Black.