Acid design is a graphic aesthetic born from 1980s-90s rave and club flyer culture, marked by neon colors, melting or warped typography, halftone textures, and deliberate visual chaos. Psychedelic art filtered through photocopier culture and early digital tools produced the look, which drew renewed interest among graphic designers in the 2010s. In clothing, distorted logos and illegible or warped text graphics carry the prints. Fluorescent color-blocking and rave-era smiley imagery follow. UV-reactive fabrics are made for black-light environments.