Neither. They are both colors that are oft considered "formal" here, but if you were going to a black/white tie event, you would be woefully underdressed either way. They are not really "formal" they are more just conservative. As to which is "more" conservative, I think they are equal, and it boils down to the aforementioned details. Assuming all those details are equal, I think the colors themselves stand on equal ground in this matter.
8/18/14 at 9:55pm