"The fashion for psychedelic drugs gave its name to the visual style of psychedelia, a term describing a category of rock music known as psychedelic rock, visual art, fashion, and culture that is associated originally with the high 1960s, hippies, and the Haight-Ashbury neighborhood of San Francisco, California. Psychedelia generally began in 1966, but truly took off in 1967 with the Summer of Love. Although associated with San Francisco, the style soon spread across the US, and worldwide.
The counterculture of the 1960s had a strong influence on the popular culture of the early 1970s, and is well recognized even by those who are naïve to its psychedelic origins. It later became linked to a style of electronic dance music commonly known as psytrance(Also known as Techno)"
"Psychedelic art is art inspired by the psychedelic experience. The word "psychedelic" means "mind manifesting". Psychedelic visual arts were a counterpart to psychedelic rock music. Concert posters, album covers, lightshows, murals, comic books, underground newspapers and more reflected not only the kaleidoscopically swirling patterns of illusions, but also revolutionary political, social and spiritual sentiments inspired by insights derived from these psychedelic states of consciousness..." - wiki