This is not proof of anything, it does not state that green is best....and I have never seen yellow green cloth which is the color cited specifically in the article, and on the graph.
Many changed there minds based on this -- give a number 2, 5 10, 20? All this shows is that you can see colors at different light levels, and the green you are stating is not even the green on the chart.
Also, you cite percentages below, exactly where are they on this graph? I see numbers on the left from 0 - 100 however there is no legend describing what the numbers represent, I think your interpretation is flawed.
I asked before, what about the 8 - 10 percent of the male population that is red green color blind. What does green cloth look like to them?
One more thing for you to ponder, have you ever played pool on green cloth, under darker conditions? How well can you see the contrast of the balls with the cloth on the table. Fairly tough isn't it?
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From one of KD links http://science.slashdot.org/story/08/04/08/2213222/what-font-color-is-best-for-eyes
Re:Great Blazing Colors (Score:5, Interesting)
by dgatwood (11270) on Wednesday April 09, 2008 @12:17AM (#23009374) Journal
Our eyes don't work like that -- they don't scan the visible spectrum from low to high, and see blue as the opposite end of red. Instead, we have receptors for certain colours, and base our colour perception on how much each of those get triggered. This is why colour blindness hits red/green or yellow/blue, despite those colours not being adjacent on the spectrum.
Yeah. That's also why unless you are colorblind, light yellow on a very dark blue will probably be about as readable as it gets because it has both luma contrast (difference in rod response) and chroma contrast (the yellow hits the red and green cones hard with just a little on the blue cones, the blue hits the blue cones and barely registers on the others). Even if you're colorblind, the huge difference in contrast should be sufficient to make it reasonably readable.
The absolute worst, IMHO, is white on medium green... you know... road sign colors.[B]KD is't this green cloth color????[/B] Unreadable until you get right up to the things, by which time you end up cutting off the guy in the next lane to slam your car into the exit lane that should have been marked 200 feet earlier.... :-D
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Re:Great Blazing Colors (Score:5, Insightful)
by Sandbags (964742) on Wednesday April 09, 2008 @08:22AM (#23011870) Journal
A lot of cities have started installing new road signs that are white on blue, or even a faint yellow on blue. They're also making the text paint reflective, but not the background blue. Unfortunately, the cost of replacing all the road signs is prohibitively expensive, but at least new ones going up are a lot easier to read.
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This curve peaks at 555 nanometers, which means that under normal lighting conditions, the eye is most sensitive to a yellowish-green color. When the light levels drop to near total darkness, the response of the eye changes significantly as shown by the scotopic response curve on the left. At this level of light, the rods are most active and the human eye is more sensitive to the light present, and less sensitive to the range of color. Rods are highly sensitive to light but are comprised of a single photo pigment, which accounts for the loss in ability to discriminate color. At this very low light level, sensitivity to blue, violet, and ultraviolet is increased, but sensitivity to yellow and red is reduced. The heavier curve in the middle represents the eye's response at the ambient light level found in a typical inspection booth.
Many changed there minds based on this -- give a number 2, 5 10, 20? All this shows is that you can see colors at different light levels, and the green you are stating is not even the green on the chart.
Also, you cite percentages below, exactly where are they on this graph? I see numbers on the left from 0 - 100 however there is no legend describing what the numbers represent, I think your interpretation is flawed.
I asked before, what about the 8 - 10 percent of the male population that is red green color blind. What does green cloth look like to them?
One more thing for you to ponder, have you ever played pool on green cloth, under darker conditions? How well can you see the contrast of the balls with the cloth on the table. Fairly tough isn't it?
---------
From one of KD links http://science.slashdot.org/story/08/04/08/2213222/what-font-color-is-best-for-eyes
Re:Great Blazing Colors (Score:5, Interesting)
by dgatwood (11270) on Wednesday April 09, 2008 @12:17AM (#23009374) Journal
Our eyes don't work like that -- they don't scan the visible spectrum from low to high, and see blue as the opposite end of red. Instead, we have receptors for certain colours, and base our colour perception on how much each of those get triggered. This is why colour blindness hits red/green or yellow/blue, despite those colours not being adjacent on the spectrum.
Yeah. That's also why unless you are colorblind, light yellow on a very dark blue will probably be about as readable as it gets because it has both luma contrast (difference in rod response) and chroma contrast (the yellow hits the red and green cones hard with just a little on the blue cones, the blue hits the blue cones and barely registers on the others). Even if you're colorblind, the huge difference in contrast should be sufficient to make it reasonably readable.
The absolute worst, IMHO, is white on medium green... you know... road sign colors.[B]KD is't this green cloth color????[/B] Unreadable until you get right up to the things, by which time you end up cutting off the guy in the next lane to slam your car into the exit lane that should have been marked 200 feet earlier.... :-D
Parent Share
Re:Great Blazing Colors (Score:5, Insightful)
by Sandbags (964742) on Wednesday April 09, 2008 @08:22AM (#23011870) Journal
A lot of cities have started installing new road signs that are white on blue, or even a faint yellow on blue. They're also making the text paint reflective, but not the background blue. Unfortunately, the cost of replacing all the road signs is prohibitively expensive, but at least new ones going up are a lot easier to read.
---------
This curve peaks at 555 nanometers, which means that under normal lighting conditions, the eye is most sensitive to a yellowish-green color. When the light levels drop to near total darkness, the response of the eye changes significantly as shown by the scotopic response curve on the left. At this level of light, the rods are most active and the human eye is more sensitive to the light present, and less sensitive to the range of color. Rods are highly sensitive to light but are comprised of a single photo pigment, which accounts for the loss in ability to discriminate color. At this very low light level, sensitivity to blue, violet, and ultraviolet is increased, but sensitivity to yellow and red is reduced. The heavier curve in the middle represents the eye's response at the ambient light level found in a typical inspection booth.
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