If you want to match timber, usually most important across the front three, the easiest way is simply using the same speaker for L/C/R. Or at least from same brand and lineup (or if another line from the same brand they may advise it matches or not). Usually not a huge deal in any case. Don't know what the sub color has to do with it, there are subs that can come in a variety of finishes, but it will just likely cost you more. Or you could apply your own cherrywood veneer to match your speakers.
