5:6:5 RGB Considered Harmful

[Benjamin M. Schwartz]

Quoting Albert Cahalan <acahalan at gmail.com>:
> 5:6:5 can't even do grey.

I can't speak to the other problems with 565, but this one can be partially
remedied.  In 565, white is normally (31,63,31).  If we change our display's
color balance so white is (31,62,31) then there are 30 available exact shades
of gray.

We lose essentially no precision, and the format becomes a strict superset of
555.
Of course, (31,63,31) would be clipped to white.

Just a thought.

--Ben