I didn't even notice the colored numbers until I read the comments. For myself, the colors are easy enough to distinguish (as separate colors), as the red looks brighter than the green. If I didn't already know the colors were red and green, I think I'd be able to pick out the one that is clearly red (As there is a shade of red for sure in the title bar), but I do not believe I'd be able to say with certainty that the green is green (and not another shade of red).