Say there were three dots of lime green and three dots of that same lime green but with a little black mixed in, making it slightly darker, could a color blind person who is blind to that color tell the dots apart as well as a normal person?
I figure since the wavelength of the light never changes, only the amplitude, while the person might not be able to tell what hue of green it is, they should be able to tell which is brighter? Because the S and L cones should be firing the same amount for both shades, just less intensely for the darker one?
Can someone explain if a cone deficiency means you cannot tell different shades apart please, thank you.
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I find it difficult personally, but it’s mostly with certain colours. Blue and purple are my difficult ones and light green and yellow. Dark Green and brown.
If I was to look at dots like in the colour blind test, I have a difficult time telling them apart with slightly shifting shades
My best friend is color blind and he can tell shades apart, just not tones. So yes he can tell that you made a color darker.
Fun fact, the ability to see shades without color makes him able to see directly through camouflage like it’s not even there
colour blindness isnt the same for everyone but my cousin is red-green colour blind and he struggles with gameboard pieces sometimes where he cant tell the difference between red, pink, and purple. even if they are neon bright colours.
he says they appear as almost imperceptibly different shades of grey
but he can see yellow letters on a white background with no problems whatsoever, which is really difficult for me as a colour-seeing individual
You can simulate total colorblindness (a rare condition in humans, most ‘color blind’ people simply have trouble telling shades of green from red (deuteranomaly).
All you need is a dark room and a monochromatic light source, like an LED or laser. A cheap ‘tunable’ LED light can do in a pinch.
You’ll find that you can’t decern colors at all. Items that reflect the color you picked more are brighter, ones that absorb the frequency are darker, but with no contrast and a single frequency to work with you can’t tell colors apart.
But you CAN, however, tell shades apart, seeing how bright or dark the color is. (You can tell how much black is mixed in the lime green, in your example.)
I’m colour blind and I can see every colour of the rainbow. What I can’t do is tell the difference (in bad lighting) between black and dark green. Mostly with Matt finishes. I also can’t work out , using my
Brain, whether something is pink or purple.
Maybe specific to me, I can’t really recall which colour clothes people wear, or see much colour in fireworks, they seem dull really.
Yes, and in fact there’s some evidence to suggest that colourblind people are quicker at this than people with regular colour vision.
I find it easier to explain it like this.
Say you have a bucket of blue paint. You put a few drops of red in it, you mix it and now it’s purple.
Only, you put just a few drops in and it literally looks the same.
Put a lot more red paint in that blue paint and it looks purple.
I can’t tell the difference until there’s A LOT of paint added.
I suppose what I’m trying to say is that you’ll see two different colours while I only see the same colour.
I might be able to tell it’s darker. But I can’t say for certain it’s a different colour.
Your eyes seeing color has little to do when you are blacking out some of the object or light. Even someone with perfect eyesight will not be able to see colors correctly if you black out some objects in front of them.
My colour blindness (reds, wines and browns) depends on whether it’s glossy or matte, the materials I’m looking at, the way it’s printed, what other colours are nearby as a comparison…
Sometimes the colours look identical, other times, I can tell them apart, just.
For years as a kid, I thought my brother’s and my bedroom carpet was brown. I was genuinely shocked – and disbelieving – when my parents told me that it was a deep red/wine.
So, my answer? It depends.