

Have been working with two red-green blind people for some years. They told me they didn’t know for the longest time. One of them became an electrician, the other one was disqualified since he couldn’t differentiate between red and green. That’s how he found out. The electrician guy found out years later once he questioned why his colleagues get the different coloured wires right all the time but he didn’t. Both of them see red and green in different grey shades, they told me something like blacker greys are red and whiter greys are green.
That’s hilarious I love it. My prior coworkers were so confused by pink & lime green and those sorts of similar shades.