Puzzle Description:

Color blindness tests generally involve a group of dots, with a number made up of dots of a different color. Most common is red/green colorblindness, so the background dots would be one of those, while the shape dots would be the other. Nearly all cases of this type of color blindness are men.

#1: Wombat (wombatilim) on Sep 6, 2009 [SPOILER]

Admittedly not the best representation ever, but it was tricky to get the idea across while still presenting a logically solvable puzzle.

I assume that you are NOT color blind. I do not believe that we have many users of this site that are (if any).
Thanks for the unique puzzle, just the right size.

Well I'm red/green colorblind and I'll admit I usually skip the red/green puzzles for that exact reason, but I'm also stubborn so I had to finish this puzzle after reading the description ;) Nice work though!

It looked like a Vindersloon-type puzzle from the clues (even though I knew it wasn't his/hers. Alas, no.

i myself can not see green. its gray to me and i remeber some of those test's when i was a kid.i can however see all the other colors. they said that green was surpose to be brown to me, but its not. its gray, not black and im not male. you r very correct. i am one in a billion or more of women that have it and even more uncommon that its gray. thanks for the child hood reminder. my dr.'s testing me when i was a kid were all so nice to me. love puzzles that bring back happy thoughts

No, I am not color-blind, myself, but I find perception of all sorts fascinating, and color blindness falls under that. I had a friend who is totally color blind, and I asked him to describe what the colors were like to him... the best explanation I heard was that when he was coloring pictures as a kid, the sky was always pink until someone told him that was wrong. The pink crayon, to him, looked far more like the sky than the blue did, because it was the right lightness.

harris, there are actually other types of color blindness that are overall more rare, but effect women & men equally. It sounds like you have one of those. :)

Very interesting concept for a puzzle! At first I thought it was going to be a Christmas wreath, and I thought "geesh - it's only Labor Day!!!" Thank goodness I was wrong! Nice work, Wombat!!!

I really like this puzzle, Wombat. Very interesting subject, and it was fun to solve.

I am color blind, but not the typical red/green type. I have a hard time seeing blue on white or grey on black or grey on white, and have trouble with lots of blues and greens.

I also have age-related macular degeneration (which I inherited from both my parents and I have it at a much earlier age than most people who get it). I can't believe I can still solve these puzzles, because it affects the straightness of lines (grids look a little crooked) and pinpoint center vision (those tiny dots in the center). I'll play on this site as long as I am able. I don't know what I'll do for fun when I can no longer read, play webpbn, drive, or browse the Internet. Maybe I'll save up to buy a giant monitor! Yeah!

One of my parents' friends is completely color blind, I haven't ever talked to him about it myself, but I guess he basically sees greys. He is also an avid bird watcher. Which amazes me. He uses the shape/size along with the song to identify them.

Personally I don't have any color problems, I'm just really really near-sighted. Glasses are a very good thing as far as I'm concerned. Without them things are only clear for about three inches in front of my nose, any farther away and everything gets very blurry very fast!

One of my (brief) co-workers was totally color-blind. Since he was hired as a finisher, this was not to his advantage. -- Of course, he was screwing up the "wrought-iron grey" finish, too, and that's only shades of grey. Turns out he also needed glasses.

Myself, while I'm not colorblind, I've also been interested in color perception since third grade. That day, I was outside ignoring the "field day" we were supposed to be "enjoying" and was looking intently at the grass.
For some reason (maybe being a kid is enough reason) I decided to do a "railroad crossing signal" with my eyes - alternately winking each eye rapidly. I noticed that each of my eyes sees colors differently. My left eye sees colors as redder than my right.

And the puzzle was fun to solve. I did all the green first. Very tough.

Cool puzzle. A coworker just filmed his brother receiving glasses that somehow "correct" color blindness, and the wearer is able to distinguish the colors correctly. It's a very neat idea that we may be able to help a portion of the population gain perception of the colors they've been missing this whole life. (and yay for this being by a wombat, one of my favorite animals!)

I'd heard about those glasses! Apparently they were developed for another reason entirely and then they discovered they fixed red/green colorblindness completely on accident.

I just had to look these up:
http://www.smithsonianmag.com/innovation/scientist-accidentally-developed-sunglasses-that-could-correct-color-blindness-180954456/?no-ist

A little more about the science:
http://enchroma.com/technology/

Nice puzzle. Before I solved it, the title reminded me of a poem:

I saw a man upon the stair
A little man who wasn't there
He wasn't there again today
Gee, I wish he'd go away.

As a science teacher, I had some lectures and demonstrations that were about color so I would poll my students for difficulty with color vision. With about 150 students a year, I had 1-3 males each year who reported various color perception difficulties and 2 females during by entire 30 year career. I had one class of 36 students with 3 males reporting.

I once worked with a guy who was in complete denial of his color blindness. He was telling me about the green car he had ordered but had come in blue. He was so angry at the car dealership, but had to take the car anyway. When we got to the parking garage, there was his vibrant green car. He said, see? A blue car! All I could do was stand there and not say a word.

I'm late to the game here, and also thought it was a wreath, but couldn't figure out how that worked with the title until I was far enough along to figure out what you were doing. A very interesting solve, but also a great reminder that some people may not be able to solve these puzzles due to differences in color perception -- a worthy subject!

Even people with "normal" color vision have differences in their perception. At intersections, my wife insists that the figure in the "walk" sign has a hint of green, but it looks white to me.

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