I am red-green colorblind and I actually thought the article nailed it in my case. Don’t depend on differences in hues, but use differences in contrast (saturat

I am red-green colorblind and I actually thought the article nailed it in my case. Don’t depend on differences in hues, but use differences in contrast (saturation and brightness). If UI folks followed this rule I’d be good. Aside: Last time I was in Spokane some genius decided to turn the light signals sideways. I had no way to tell whether to go or stop w/o watching other.