Adverb
psychedelically (comparative more psychedelically, superlative most psychedelically)
In a psychedelic manner.
He saw Joplin's psychedelically painted Porsche 356C Cabriolet in the parking lot. Source: Internet
In the "Tell Mama" video shown on MTV in the 1980s, Joplin wore a psychedelically colored, loose-fitting costume and feathers in her hair. Source: Internet