[BScout]

The keys can display it. They used to look just fine. Yellow was yellow. Dark colours were easy to tell apart. (It's not a hardware limitation)

But then Eucontrol changed its channel strip look (darker strip with only the track label area matching the colour in Pro Tools) and now they don't work well for dark colours. And that yellow is messed up to green (because it is trying to do some weird "dark" yellow.)