From:	"Anthony.Appleyard" <MCLSSAA2 AT fs2 DOT mt DOT umist DOT ac DOT uk>
Organization:	Materials Science Centre
To:	djgpp AT delorie DOT com
Date:	Mon, 20 Oct 1997 08:12:07 GMT-1
Subject:	Re: ALLEGRO - 256 shades of grey?? How?
Reply-to:	Anthony DOT Appleyard AT umist DOT ac DOT uk
Message-ID:	<137F401058B@fs2.mt.umist.ac.uk>

  Sean Gilley <gilley AT netunlimited DOT net> wrote:-
> Here is what you get for a degree in Fine Arts.... Most people can't see
> more than 10 shades of grey. No human can see more than 20 shades of grey.
> On a related note. we humans can only see about 60,000 distinct
> colors/shades.

In comparing the usefulness of the various DOS colour modes, I found that if I
displayed a green colour gradation on the screen, with 32 shades of green (as
in 15 bit per pixel modes) I could still distinguish each colour from the next
and see the steps between the colours, but with 64 shades of green (as in 16
bit per pixel modes) I could not and the colour gradation looked smooth.

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