I'm still not too happy with the name myself but to match it, I'd pick gold.
Gold has always been a symbolizing color of royalty by numerous monarchies for centuries - from the Egyptians, Romans, Greeks, Persians, Chinese, Koreans, Aztecs, Incans, British, French, Spanish etc. Ok sure, T-ara may not be monarchs, yet alone even members of royalty but the color suits the name in my opinion.