"Resonant Blue"(リゾナント ブルー,Rizonanto Burū?) is the thirty-sixth single of J-pop idol group Morning Musume. It was released under the Zetima label on April 16, 2008. The Single V DVD of the single was released on April 23, 2008.
There are three editions. Limited edition A comes along with a bonus DVD, while limited edition B comes with another DVD. The catalog numbers of each limited edition copies are EPCE-5540 and EPCE-5542, respectively. The regular edition has a catalog number EPCE-5544.
With the original, Another ver., a Studio Dance Shot version, a Night Scene version, and a One-cut Dance version, it makes the most PVs ever released for one single. Also notable is the smoky eye make-up used on the members, a daring new look for Morning Musume as they attempt to expand into Asia.