John N. Gretchen III wrote:
on my monitor, with room light off or on, a b & c look the same and x y
& z look the same. can I get some feedback on what you see?

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On my CRT processing monitor all are easily seen. On the LCD monitor of
my internet computer Y and Z are nearly but not quite identical. A and
B are totally saturated. I see a very small change in C. This is after
many attempts to get it better that have failed over the years. The CRT
is 7 years old and the LCD 7.5 years old so neither are today's state of
the art. Though I expect CRT's stopped evolving years ago. I've been
wanting to replace the LCD but those that can equal the CRT seem to
still cost over $1000 so it hasn't happened as yet.

Rick

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Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".