Red first, then the green one. Although it doesn't matter if you reversed the order. Red is likely more mellow and sweet, the green one more sour. As far as I know, there are no naturally blue or purple apples, so one ought to try to find out why they are coloured so. If it's because of mold, it's quite obvious. If they are artificially coloured (painted), they might be safe after peeling, but there's really no way to verify that, unless you can immediately see the paint was obviously not meant for foodstuff. Nevertheless, after two apples, you aren't going to drop dead immediately anymore.