And green/red is not so great for the most common type of colour blindness: https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-bli

And green/red is not so great for the most common type of colour blindness: https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/color-blindness/types-color-blindness https://www.nei.nih.gov/learn-about-eye-health/eye-condition...