I really love your colors!! I'm too much of a novice to help you with advice, but I'm reading along for the expertise of others. If I thought there were no chance of orange showing through ,and hubby requested it, I'd honor him with that. But if the back color would influence it somehow, I'd gently explain that to him and suggest something suitable. It's too much hard work with white on top to get muddied by a dark color. But as I said, I just don't know.