Who should be matching amongst groom and immediate family?

We are having bridesmaids but no groomsmen. Our colors are burgundy, navy and gold. My FH will be wearing a navy suit with gray vest and burgundy tie and my bridesmaids will be wearing burgundy. Should my brother (who is also walking me down the aisle) match my FH somehow? And what about my ring bearers? I do plan on buying all the male immediate family members and ring bearers boutonnières with a burgundy flower. I know I can do whatever I want, and I plan to but I would like all those participating in the ceremony to “blend” in somehow if that makes sense. Also, I’m not requiring my brother or ring bearers or future FIL to wear any kind of specific color suit or anything