Original color (basic) Red ( red) , Green ( green) , Blue ( sky blue) ( Sky Blue) in short term RGB is called the original color. Learn how to easily remember "real" A = sky , S = green , L = red. However , even if you read "Nilas", there is no problem . Millions of colors are all made or can be made from these three colors. All visible media (TVs , digital cameras , mobile phones , LCD screens , LED TVs) are following the RGB theory and will continue to do so , with the exception of the color printing formula ( CMYK, the main color in printing) .