Psychedelic posters and colors

http://www.atlasobscura.com/articles/trippy-blacklight-posters-from-the-psychedelic-heyday?utm_source=Atlas+Obscura&utm_campaign=06236d35a5-Newsletter_4_18_20164_15_2016&utm_medium=email&utm_term=0_62ba9246c0-06236d35a5-61589541&ct=t(Newsletter_4_18_20164_15_2016)&mc_cid=06236d35a5&mc_eid=1a7c15e6d6