A color space is a uniform representation of visible light and a specific organization of color. In cinema and TV domains, we mainly use RGB (representation of a color by its Red, Green and Blue primary components) or Yuv (representation of a color by its luminance in black and white, and it chrominance in Red and Blue) color spaces. Bitrate Other color spaces like Lab are more representative of the color perception model of human beings. 2 different displays have generally different RGB color spaces. Reason why Color Calibration is necessary.