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well, i dont think there is a connection between colour blindness and computer working...
What should be interesting would be to know the proportion of people having such colour blindness in the general population and to compare with the CP people 
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I have known several color blind people who find it aggravating that applications frequently rely on color to convey important information (e.g. red for errors.) If you can't distinguish between colors then the meaning is lost.
Therefore, I think that if you are designing user interfaces it is important to ask the question, how would this look to a color blind user.
As a side note, I find Color schemes generator 2 very help for designing color schemes with purpose in mind.
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I have a colour perception defficience, what should i vote for ?
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Colour blind. You are "blind" to at least one colour. Colour blind people don't necessarily see the world in B+W.
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for me blind seemed "not seeing"
what if i see all colours but some switched ?
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Alexandre GRANVAUD wrote: what if i see all colours but some switched ?
Dunno mate, maybe something like synthenasia?
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Not that funny.
I have problems distinguishing between certain nuances of red, green and brown...
Well, not really a handicap to me, but I'm not allowed to become a forester or an electrician, if this thing with software development goes wrong.
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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Yeah, I can totally see you getting rejected by the bomb squad ... "Now cut the brown wire ... " 
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VentsyV wrote: "Now cut the brown wire ... "
Wasn't it the green one?
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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Thomas Weller wrote: forester
Electrician I can understand but forester? Scared you'll eat the wrong mushrooms?
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You need to be able to judge a tree from the different shades of green its leaves might have...
When I was a child, the trees in my drawings often had green trunks and brown leaves. I think a forester should do something if he sees such a tree in reality... (No idea what, but for sure something.)
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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...call National Geographic?
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A friend of mine don't see difference between red and green. He is not allowed to be professional driver, however he has driving license (at least traffic lights are always in the same order  ).
Once he said the most annoying part of it is when he pays using credit card. He always hear:
"please enter your pin and press green button"
--
"My software never has bugs. It just develops random features."
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He is not allowed to be professional driver, but he is allowed to drive for private purposes ?
I personally am not afflicted that serious: I reliably can distinguish a tomato from, say, kermit , but when it comes to buying clothes, I better have someone with me...
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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Thomas Weller wrote: He is not allowed to be professional driver, but he is allowed to drive for private purposes ?
Exactly. It is one of the mysteries of life (or of law)
--
"My software never has bugs. It just develops random features."
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Eyes and laws are a curious couple indeed.
Same goes for piloting an aircraft: With glasses between -5.0dpt and -8.0dpt you are able to get a recreational (RPL) and private pilot license (PPL), but you must have better eyes for a commercial pilot license (CPL)  . You need almost flawless eyes to get a airline pilot license (APL), -2.0dpt max.
The only difference between a PPL and a CPL is that with a PPL only you yourself can determine your destination; with a CPL you are allowed to be told where to fly to.
To stear a little to the topic: with a color-deficiency you cannot get a pilot license, period.
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joep.b wrote: with a color-deficiency you cannot get a pilot license, period.
Not only that I'm not allowed to become a forester or an electrician, I also must not become a pilot??? Poor me!
You really ruined my day...
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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Tell me about it. I have -5.25dpt glasses. That's barely over the limit... you can't get any closer...  .
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But you can reliably recognize all the colours out there, albeit somewhat blurry?
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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Yep, even more than the standard spectrum, but even that didn't give me any advantage...
I'm one of the 1% people that can even see somewhat infra red and ultra violet, but I can't focus on it when it's 20cm from my face.
Don't think I can enjoy a more colourful world than other people, it's just that I see IR as a faint red and UV as a faint blueish glow. It doesn't really add all that much, but it's damn useful to check wether the remote for the TV is broken.
Joep
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I think red and green are the most common colours for colour blindness - I am colour blind to red and green, although I cant say I have ever mixed the two up - green and brown yes and blue and purple (oh and dark blue and black too).
Not sure what it all means apart from the fact that I drew brown xmas trees on home made xmas cards 
At university studying Software Engineering - if i say this line to girls i find they won't talk to me
Dan
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Thomas,
I have exactly the same problem you describe. It does appear to be a slight color-blindness, protonomaly, a deficiency in one of the three cones. I used to always describe it in the same way, I can tell red from green from brown, mostly. But is that reddish-orange, or orangish-red. My wife can show me three different shades of white, and say one has more green in it, another has more tan, and the other has a hint of yellow. I just see three different shades of white, but can't determine what makes them different.
You'll also have some trouble if you want to get a pilot's license. Both times I've gone for my medical, I've squeaked by the color-blindness test by guesswork and the good graces of the nurse. I can detect just enough difference for it not to be a problem.
Cheers,
Carl
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That is the most commen type of color blindness.
The color cells in the eye are of two types:
Red/Green and Yellow/Blue.
Color blindness is a deficiency (or absence) of either or both sets of these cells to correctly respond to colors. It does, in fact come in degrees, and these are measureable. Total color blindness is only a small subset of those considered color-blind.
The measurement consists of an image made up of colored circles of varying shades of either red/green or Blue/Yellow. The are so arranged that a number may be seen if the colors are distinguishable, and a different number is seen if they are not. This operates by taking advantage of color vision dominating shaded vision. If the colors are not distinguishable, then the number perceived is made up of various shades of gray (or green or red).
Color-blindness is not an obstacle to driving (for example) so long as the driver-to-be can either (1) perceive the color differences of red and green lights, or
(2) remembers that red is always the top and green the bottom.
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"How do you find out if you're unwanted if everyone you try to ask tells you to stop bothering them and just go away?" - Balboos HaGadol
"It's a sad state of affairs, indeed, when you start reading my tag lines for some sort of enlightenment?" - Balboos HaGadol
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I often heard about red/green deficiency, this is not too rare for men. But I never heard about a corresponding yellow/blue deficiency. Any idea why ?
Regards
Thomas
www.thomas-weller.de
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Programmer - an organism that turns coffee into software.
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