"Monochrome Effect" (モノクロームエフェクト, Monokurōmu Efekuto) is the fourth single released by the Japanese techno-pop group, Perfume.

Monochrome Effect is Perfume's second single after being signed to Bee-Hive Records, and fourth overall.

In February 2008, the single was re-released with a new cover and included in the "Fan Service ~Prima Box~" CD+DVD boxset.

This single and accompanying music video were the first to feature the distinctive "Perfume" logo designed by Kazuaki Seki.

Seki also worked as art director on the latter and would go on to direct the majority of Perfume's music videos following their major-label debut.