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  #1  
Old 10th September 2016, 05:01 AM
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Svadifari Svadifari is offline
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Default Blue's the color of the sky

Blue's the color of the sky
In the mornin', when we rise
In the mornin', when we rise
That's the time, that's the time
I love the best
-Donovan-
I read something interesting, which reminded me of something that happened many years ago. i used to be a Telcom techie, building telephone exchanges all over South Africa. Then I got sent for a stint in Namibia (those days still South West Africa) and they used a different supplier of cables, and suddenly I could not wire the terminals according to the colour code (Blue, Orange, Green, Brown, Slate) anymore, because the brown and orange looked to me like exactly the same shade of brown.
None of my colleagues had any trouble, and I have not noticed anything like that before or since.
Now...
Humans didn't even see the colour blue until modern times, research suggests

Apparently, the Himba cannot (easily?) find the blue square in this pattern:



But comfortably finds the one slightly different shade here:



Can their inability to spot the blue square in the 1st picture be compared to my inability to differentiate between orange.brown? Or is it something different?
What about the claim that blue is a 'recent' colour? Truth, half-truth or garbage?
What's going on here?
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  #2  
Old 10th September 2016, 05:03 AM
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Default Re: Blue's the color of the sky


Sorry, I really meant to post under ask a scientist, is it possible to move this?
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  #3  
Old 10th September 2016, 09:19 AM
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Default Re: Blue's the color of the sky

One of the biggest impacts of identifying colour (especially variance dyes in cable insulation) is the quality of the light in the work area and of course colour perception.

Try this and see how you go , I am sure there are many other colour blindness tests on the interwebs.

http://enchroma.com/test/result/norm...=3.54&lcs=5.69

Having done colour grading and setting up of video monitors for production work in a previous life it was all ways interesting to find that varying levels of colour perception deficiency exist in the population and for the most part unless they do a test are usually unaware of their status.

Now i just have trouble with those pesky small SMD's
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Old 10th September 2016, 11:15 AM
stevebrooks stevebrooks is offline
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Default Re: Blue's the color of the sky

Quote:
robertkd said View Post
it was all ways interesting to find that varying levels of colour perception deficiency exist in the population and for the most part unless they do a test are usually unaware of their status.

Now i just have trouble with those pesky small SMD's
It's more interesting than that, because yes there are colour perception deficiencies, such as blue/green colour blindness, but colour perception differences aren't for the most part deficiencies, almost everyone has slightly different colour perception and common colour perception tests check for just the major deficiencies, but once you get into the detailed tests that check for perception of shading you start to realise how huge human colour perception actually varies, right out to tetrachromatic vision. It's likely that people with tertachromatic vision don't even realise they are unusual unless they take a test for it, they probably think everyone sees how they see, the same applies to the rest of us.
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Old 10th September 2016, 03:34 PM
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Default Re: Blue's the color of the sky

Indeed colours can seem quite different to people.

Four instead of three colour sensitive cones potentially makes for a lot more perceived colours but seems most don't gain any beinifit.

We can do basic trichromatic tests on RGB monitors
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Old 10th September 2016, 04:52 PM
stevebrooks stevebrooks is offline
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Default Re: Blue's the color of the sky

Quote:
robertkd said View Post
Indeed colours can seem quite different to people.

Four instead of three colour sensitive cones potentially makes for a lot more perceived colours but seems most don't gain any beinifit.

We can do basic trichromatic tests on RGB monitors
Perfect score;

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Last edited by stevebrooks; 10th September 2016 at 04:55 PM.
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Old 10th September 2016, 06:58 PM
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Default Re: Blue's the color of the sky

What a cool test.

Score: 2
Gender Male
Select Age Range Above 70
Best Score for your Gender 0
Worst Score for your Gender 126

David
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  #8  
Old 10th September 2016, 09:09 PM
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Default Re: Blue's the color of the sky

I score between a 0 and a 2 depending on all sorts of external and internal processes.

Many attributes effect the outcome of this test such as ambient lighting colour spectrum. whether you've just been looking at the sky or some other "colour", just had a cup of tea and of course other stimulants or even the monitor/pc itself.

YMMV
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  #9  
Old 11th September 2016, 10:43 AM
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Default Re: Blue's the color of the sky

Huzzah! A zero for me. It was tricky though.

I wonder why colour deficiency is so high in men compared to women.
Was there something essential in human female evolution that required such a precise colour spectrum?
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Old 11th September 2016, 11:02 AM
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Default Re: Blue's the color of the sky

Quote:
Svadifari said View Post
What about the claim that blue is a 'recent' colour? Truth, half-truth or garbage?
What's going on here?
Gorm is the irish gaelic word for blue and it clearly isn't a derivitive of the english word 'blue' however gaelic has a latin base, however far removed and the latin word for blue is caeruleus. I guess the egyptians weren't the only ones to have a name for blue.
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