> This is only an issue if the _only_ difference between an error and success message is the colour. Except that a color bind person doesn't see monochrome, th

> This is only an issue if the _only_ difference between an error and success message is the colour. Except that a color bind person doesn't see monochrome, they see color, but perceive it differently. So the color palette problem isn't confined to only red and green, but also to other colors, because the spectrum as a whole is distinguished differently. Also, red/green color deficiency, while the most common, isn't the only kind of color blindness.