YCbCr

1. Y - the luminosity (roughly the brightness)
   
   
2. Cb - the chrominance (roughly color) of the blue primary
   
   
3. Cr - the chrominance (roughly color) of the red primary (Green is achieved by using a combination of these three values).
   
   
   
   Related Pages on this site:
   • Color Model (Definition)
   
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