Heimdall is what a fashionista might call a bit of a challenge. He'll work just fine in a dark suit, navy, black or grey, but the intense, golden yellow twill base will generate quite a contrast, so if you'd like a little bit less of that, perhaps a medium brown or light grey would work better. And there's probably a few other spectacular, more daring combinations lying around in outfit heaven, just waiting to be discovered. So, get creative!