diamond bipole surrounds are available in black only, whether in pinas or otherwise. there are available dfs surrounds though in other colors. eto yung mga dfs for the evo series yata, with the 5.25" woofers as against the 9.dfs' 4" ones. i saw one sa greenhills dati for around P9k, cherry colored. mas malaki siya talaga than the 9.dfs.
for the diamonds, if you want to go with the complementing color all throughout, go with the 9.SR, or better yet, the d9.1 if you have the space for it at the back.