RGB 565 - Why 6 Bits for Green Color

Question

I was checking different RGB formats and i was wondering why in the RGB-565 to the green color are assigned 6 bits and to the red and blue 5? Is there any parti

Answer 1

This is likely due to the response of the cones in the eye. Basically we are more sensitive to light in that part of the spectrum as the different cones^* overlap strongly there. Whereas most light in the blue end of the spectrum, for example, is primarily picked up by only one.

It makes sense to spend the additional bit where it will do the most good.

_{^*There are 3 types: the aptly named Red, Green, and Blue cones.}