[AQXt]

> When simulating protanopia, reds should appear darker, due the lack of L cones. However, many simulators incorrectly display red as bright green instead.

For those who can't "see" it:

For people who have protananomaly, bright red (#ff0000) may look like `#cc0000` -- but it's clearly different from bright green (#00ff00) or gray (#cccccc).

Things get confusing with colors like pale brown (#997755) which may look something between fern green (#557755) and dim gray (#667755).