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[–] 26 points 1 week ago (9 children)
  • [–] 15 points 1 week ago (2 children)

    What on earth does red+yellow mean? "It's about to be green"?

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  • [–] 14 points 1 week ago (5 children)

    This is why modern green lights have a blueish tint to them. At least here in the US, older green lights were more of a pure green, and that meant for red-green colorblind people it was much harder to differentiate between red lights and green lights. But in this image you can see that the slight blue tint makes them pretty different.

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  • [–] 9 points 1 week ago (1 child)

    Here I was thinking the position of the light itself was the fallback.

    But then you got single blinking yellow vs single blinking red and I guess in those scenarios colorblind people just have to guess real good?

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