The only place I can think of where people are more religious about such things is church. I haven't darkened the door of my church for nearly two years now, but I remember distinctly that they had a bright brass altar rail, brass lecterns, and silver pieces on the altar. If I were you, I wouldn't slap a big golden brass sporran cantle up against a big silver-chrome 3X5 card belt buckle, but anything else would probably do just fine. If it worries you, you can do as one old girlfriend of mine did- get a few pieces that are both "yellow" and "white" and then wear everything else to match them, either the yellow OR the white part. It would be fairly easy to add a brass badge onto a chrome buckle. Then you would be set for whatever came your way.