The psychedelic poster art of late-1960s San Francisco was the visual heartbeat of the counterculture — concert announcements for the Grateful Dead and Jefferson Airplane rendered in warping, barely-legible letterforms that dissolved into swirling organic illustration. Artists like Wes Wilson and Victor Moscoso weaponized color theory, pairing hot pink against lime green at matched luminance to make the ink literally vibrate on paper.

This design system channels that hallucinatory energy into interface tokens: a warm cream ground recalling poster stock, high-saturation complementary color pairs that optically buzz, display typography drawn from psychedelic display faces, and dense ornamental patterns that reward close looking.