Well, I passed that test 100%. Interesting points raised on that site:-

" What bothers colorblind people most?
- When grilling a piece of meat, a red deficient individual cannot tell whether it is raw or well done. Many cannot tell the difference between green and ripe tomatoes or between ketchup and chocolate syrup! Many others are always buying and biting into unripe bananas - they cannot tell if they are yellow or green, and the matt, natural material makes it even harder to distinguish.
- Some food may look definitely disgusting to color vision deficient individuals: a plate full of spinach, for instance, just appears to them like cow pat.
- They can however distinguish some citrus fruits. Oranges seem to be of a brighter yellow than that of lemons.
- A colorblind person is generally unable to interpret the chemical testing kits for swimming pool water, test strips for hard water, soil or water pH tests because they rely on subtle color differences.
- Many colorblind people cannot tell whether a woman is wearing lipstick or not. More difficult to handle for some is the inability to make the difference between a blue-eyed blonde and a green-eyed redhead.
- Color vision deficiencies bother affected children from the earliest years. At school, coloring can become a difficulty when one has to take the blue crayon - and not the pink one - to color the ocean.
- Bi-color and tri-color LEDs (Light Emitting Diodes): is that glowing indicator light red, yellow, or green? Same problem with the traffic lights..."

The 1st one would cause a problem for raw-meat-eaters, I guess.

Cooking red meat causes a problem for me, because it's hard to tell when to stop cooking once I've started (I can't see a red or pink center very well). But if I don't cook at all, it poses no problem whatsoever. So giving up cooking and simply eating raw meat actually makes life easier for red-green colorblind people like me. With raw meat you don't have to worry at all about what color to cook it to.

Color-deficient would actually be a more accurate term than colorblind. I can see a rainbow, it's just not as brilliant or colorful as it is for people with color-enhanced vision. It's kind of neat to learn that my vision is luminosity-enhanced, though. I wasn't aware of that, though that's part of the way I determine whether the light is red at the stoplight (it's brighter when lit--though I can detect the colors a bit and I also know the locations). I wonder if my vision is movement-enhanced too. Movement-vision would be more important to a hunter than color vision.

The more I think about it, the more the hunter-adaptation explanation for colorblindness makes sense, more so than the genetic defect through antigenic diet explanation. Is anyone else here colorblind and, if so, what type of diet do you do best on, plant-based or flesh-based?

OK, I created this new thread - http://www.rawpaleoforum.com/carnivorous-zero-carb-approach/does-color-blindness-suggest-a-hunter-past - because there seems to be much more to color blindness than I ever realized. It's a pretty fascinating topic that may produce additional knowledge about raw Paleolithic nutrition.

I got to the butchers and it was shut!

When I got to the supermarket, all thought of carbs flew from my mind and I just bought a big leg of NZ lamb (likely fed on grass, I think).  Just seeing it, my mouth started salivating.  I bought a bit of kale, as some sort of veggie token, but I think I'm converted.  Something in me is desperate for more meat now it's got a taste for it.

One part fat to three parts meat sounds about right.