Colour Blindness Info?
Discussion
Hi Guys,
Im after some links to information about colour blindness, especially with regard to reading magazines etc. I am designing a newsletter and laid out one page with a deep red text on pale green wash background. Im told this is especially bad for colour blind people. Any info guys?
Dave
Im after some links to information about colour blindness, especially with regard to reading magazines etc. I am designing a newsletter and laid out one page with a deep red text on pale green wash background. Im told this is especially bad for colour blind people. Any info guys?
Dave
No idea, but you can take am online test for it here:
www.liquidgeneration.com/sabotage/vision_sabotage.asp
www.liquidgeneration.com/sabotage/vision_sabotage.asp
Red / Green is the most common colour blindness and if you put shades of red & green together a colour blind person will see them both as red or green, they will not be able to distinguish that there are two colours, well thats how it affects me anyway.
Instead of people pointing at grass and asking what colours that? and sniggering...
Where you duely respond with its green and punch them
Instead of people pointing at grass and asking what colours that? and sniggering...
Where you duely respond with its green and punch them
KITT said:
No idea, but you can take am online test for it here:
www.liquidgeneration.com/sabotage/vision_sabotage.asp
KITT said:
No idea, but you can take am online test for it here:
www.liquidgeneration.com/sabotage/vision_sabotage.asp
Must be getting better i got to plate 5,as a kid i couldnt get past plate 0ne.
Dakkon said:
Red / Green is the most common colour blindness and if you put shades of red & green together a colour blind person will see them both as red or green, they will not be able to distinguish that there are two colours, well thats how it affects me anyway.
Instead of people pointing at grass and asking what colours that? and sniggering...
Where you duely respond with its green and punch them
Thanks Dakkon, very helpful.
Dakkon said:
Instead of people pointing at grass and asking what colours that? and sniggering...
Where you duely respond with its green and punch them
I've got mild red-green and that is my experience too. Tell someone you're colour-blind and they invariably pick up the nearest coloured object (let's say a yellow pencil, for sake of argument) and ask you what colour it is. You say "yellow 
", they say "no, it's black". Yeah, whatever. 
There are some foreground-background combinations that make the text look as if it is flashing and it's quite painful. Red text on a blue background tends to do it for me.
ZR1cliff said:I got the first one right and all the others wrong. In fact, I didn't even get the same answers as "abnormal vision sees...".
No idea, but you can take am online test for it here:
www.liquidgeneration.com/sabotage/vision_sabotage.asp
Must be getting better i got to plate 5,as a kid i couldnt get past plate 0ne.
Oh, apart from the bloodied head joke thing. Obviously I saw the green blood.
ZR1cliff said:
Only males can be colour blind,not a lot of people know that.
Except thats not true. More males than females but females can be colour blind too. I know 2 girls who are!
I have more green light reactive cones in my right eye which means on those number dot tests I see normally with my right eye shut and can actually see both numbers with my right eye...is really weird!!
KITT said:
No idea, but you can take am online test for it here:
www.liquidgeneration.com/sabotage/vision_sabotage.asp
Been looking for this for ages. Found it once, then could never find it again. Thanks.
Ok, I'm severe red/green blind, I can tell the difference but only in white light.
There are 3 colour sensors in your eyes, red, green and blue. There are also white light sensors. Hence in red green blindness, some of the red cones are filled with green detector or vice versa, this causes a green bias and places increased reliance on the "rods" (light sensors). The rods say "Light" your blue cones say "No Blue", your green cones say "No green" your red cones (the few there are) say "A bit of red" and so your brain makes the deduction that there is lots of red. I see it as a different colour to green and it certainly seems very red to me.
Normal people are called "Trichromats" which means they have distinction of colour regardless of light, "Dichromats" are people with one cone system down. Monochromats are a different ball game, the chromosome in question is no 14 I think and it's very rare to have a blue/yellow blind person.
Genetically, the final pair of chromosomes (pair 23) are duplicates in females (XX) and in males an Xy which is a different ballgame, if dodgy genetic info is present on one X of the pair (in a female) the good chromosome can mask it (recessive gene) whereas there is no masking effect in men due to the Y chromosome containing different information. So, in order to have a colourblind female, she must have 2 dodgy X chromosomes, one from a colourblind father and one from a colourblind mother. It also follows that a colourblind mum will have colourblind sons and "carriers" for daughters.
So, I have a shagged X chromosome, when I have a son, he will get my Y chromosome (part of the set), so my dodgy X will not be passed on, however if I produce a female, she will get my dodgy X and be a carrier (unless mother is a carrier too) her son will then inherit the dodgy X and be colourblind, hence it appears in men, is carried by females and skips a generation.
As quite a severe colourblind chap, funnily enough I have excellent long distance sight (which I reckon is down to green having a shorter wavelength) this is a proper oddity which I would be interested in hearing more about, I can see reds put my powers of distinction go to shit when the background light is artificial or spectrum biased.
I would say that unless you are looking at finding a red in a complex green/brown background, it ain't a problem.
that's my take anyway.
There are 3 colour sensors in your eyes, red, green and blue. There are also white light sensors. Hence in red green blindness, some of the red cones are filled with green detector or vice versa, this causes a green bias and places increased reliance on the "rods" (light sensors). The rods say "Light" your blue cones say "No Blue", your green cones say "No green" your red cones (the few there are) say "A bit of red" and so your brain makes the deduction that there is lots of red. I see it as a different colour to green and it certainly seems very red to me.
Normal people are called "Trichromats" which means they have distinction of colour regardless of light, "Dichromats" are people with one cone system down. Monochromats are a different ball game, the chromosome in question is no 14 I think and it's very rare to have a blue/yellow blind person.
Genetically, the final pair of chromosomes (pair 23) are duplicates in females (XX) and in males an Xy which is a different ballgame, if dodgy genetic info is present on one X of the pair (in a female) the good chromosome can mask it (recessive gene) whereas there is no masking effect in men due to the Y chromosome containing different information. So, in order to have a colourblind female, she must have 2 dodgy X chromosomes, one from a colourblind father and one from a colourblind mother. It also follows that a colourblind mum will have colourblind sons and "carriers" for daughters.
So, I have a shagged X chromosome, when I have a son, he will get my Y chromosome (part of the set), so my dodgy X will not be passed on, however if I produce a female, she will get my dodgy X and be a carrier (unless mother is a carrier too) her son will then inherit the dodgy X and be colourblind, hence it appears in men, is carried by females and skips a generation.
As quite a severe colourblind chap, funnily enough I have excellent long distance sight (which I reckon is down to green having a shorter wavelength) this is a proper oddity which I would be interested in hearing more about, I can see reds put my powers of distinction go to shit when the background light is artificial or spectrum biased.
I would say that unless you are looking at finding a red in a complex green/brown background, it ain't a problem.
that's my take anyway.
Boy what a can of worms this is.
Great piece of work from Love Machine. I've not seen it explained in that detail for years.
I'm all sorts of colour blind. As are both my brothers.
Red/Green for certain, but I don't recognise any blue based 'colours' they are all blue.
So I can't differentiate between blue/lilac/turquoise for instance.
I don't even recognise purple. Its either pink or blue (blue mainly)
I work in Ronald McDonald colour. Anything other than that is no use.
Right, back to your question then.
Mid to Dark Red on Black absolutely not. It makes my eyes hurt.
Same applies to Dark Blue on Black.
Yellow on a dark colour like Red or Blue works well but that seems to upset the Trichromats.
Dark Red or Black on Yellow works well too but Blue on Yellow is fuzzy.
As for the 'RWANDA' thing. Am I missing something, it looks grey scale!
Oh, I am very sensitive to light which means I wont be without my sunglasses for about 10 months of the year.
On the upside, I have fantastic night vision and find it comfortable to drive at night in sunglasses. I believe thats a side effect of colour blindness.
And finally, I'm told my TVR is a great colour - Sapphire Blue - but although I like it I don't LOVE it like I loved the old one which was Juniper Green - which everyone else thought looked like either snot or puke.
See - Worms and a tin recepticle
Great piece of work from Love Machine. I've not seen it explained in that detail for years.
I'm all sorts of colour blind. As are both my brothers.
Red/Green for certain, but I don't recognise any blue based 'colours' they are all blue.
So I can't differentiate between blue/lilac/turquoise for instance.
I don't even recognise purple. Its either pink or blue (blue mainly)
I work in Ronald McDonald colour. Anything other than that is no use.
Right, back to your question then.
Mid to Dark Red on Black absolutely not. It makes my eyes hurt.
Same applies to Dark Blue on Black.
Yellow on a dark colour like Red or Blue works well but that seems to upset the Trichromats.
Dark Red or Black on Yellow works well too but Blue on Yellow is fuzzy.
As for the 'RWANDA' thing. Am I missing something, it looks grey scale!
Oh, I am very sensitive to light which means I wont be without my sunglasses for about 10 months of the year.
On the upside, I have fantastic night vision and find it comfortable to drive at night in sunglasses. I believe thats a side effect of colour blindness.
And finally, I'm told my TVR is a great colour - Sapphire Blue - but although I like it I don't LOVE it like I loved the old one which was Juniper Green - which everyone else thought looked like either snot or puke.
See - Worms and a tin recepticle
barreti said:That's really interesting. I've always noted that I needed sunglasses quite often when I was younger, although these days I can cope without them in most circumstances. However, I have always had (and still do) excellent night vision. I've never made the link between that and my colour blindness though. Interesting.
Oh, I am very sensitive to light which means I wont be without my sunglasses for about 10 months of the year.
On the upside, I have fantastic night vision and find it comfortable to drive at night in sunglasses. I believe thats a side effect of colour blindness.
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