For dark brown, a brown or dark tan should be absolutely fine. If in doubt, get a neutral polish. I use one by Kiwi to polish one of my pairs of brogues which has several shades and it gets quite a nice shine.
Really invest in lots of polishes, brushes and cloths. It pays to have a decent polishing kit. I have an old shoe box packed to the brim with polishes, creams, cloths, brushes, sprays, suede-cleaners, suede brushes etc.
Oh and btw, I recomend Jones Bootmakers lint-free cloths for finishing off your shine. Great for brogues in particular as the bits don't get caught in the broguing.