Oh, right - they turn yellow if the track is record-armed just to remind you. I don't think that's possible to disable without editing the theme. If you want, though, the Default 5 Nitpicky Edition theme in my signature might help. It changes as little as possible, polishing up some rough edges, and re-enabling some color options that the default theme has disabled. With that, you can change the meter colors yourself in the Theme Tweak window.