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A comment on Why Japan Has Blue Traffic Lights Instead of Green. Parent comment

Re:Why Japan Has Blue Traffic Lights Instead of Green by galangalalgol on Monday October 23, 2023 @11:22AM (#37986982)
The mothers of some red-green colorblind children are tetra chromatic, so they actually see more. I think hexa chromatic also exists.

Edit: somehow didn't notice you'd linked this.

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Re:Why Japan Has Blue Traffic Lights Instead of Green by Izkata on Monday October 23, 2023 @04:16PM (#37990964)
I edited it in like under a minute afterwards, you may have opened the page right in the middle. I don't usually bother with an "Edit:" note if it's that fast.
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