Why Trippy Tees Are the New Black Style | Altered-Minds | Hoodies | T-shirts — And How to Style Yours Without Looking Try-Hard The psychedelic swirl first splashed onto cotton in the late ’60s, when counter-culture kids DIY-soaked bed sheets in buckets of Rit dye. Fast-forward six decades and that same kaleidoscope now saunters down Paris runways—proof that rebellion ages into classic status when the vibe is authentic.