Quote:
Originally Posted by Cinisajoy
Your last sentence may be the reason my husband can detect very subtle color changes.
Oh and from just the three primaries, black and white, there are 454 shades of DMC floss and 18 variegated skeins.
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It is not as rare as the quote makes it sound.
How about shades of red?
Can he pick out two that look different to him, that look the same to you?
Some people have a greater range of detection in the 'red' range receptors (about as rare as the above condition).