matchy-matchy
adj.β Β«Slip dressing is still gorgeous, but ditch the Lolita style and go for Harlowβwhether itβs satin, velvet or a clingy little knit number. The main vibe is to mix it all upβno, no matchy-matchy.Β» ββFestive dress” by Sandy Jaszczak Detroit Metro Times (Michigan) Dec. 23, 1998. (source: Double-Tongued Dictionary)