→Subscribe for new videos every day! https://www.→‘see’ red, green or blue light. There are different types of color blindness and there are extremely rare cases where people are unable to see any colour at all. Want the text version?: http://www.todayifoundout.com/index.php/2014/04/can-color-blind-people-see-colors-take-halluciogenic-drugs/ Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1357672/ http://mindhacks.com/2009/11/18/do-blind-people-hallucinate-on-lsd/ http://en.wikipedia.org/wiki/Photoreceptor_cell http://www.erowid.org/chemicals/lsd/lsd_info10.shtml http://www.news-medical.net/health/What-Causes-Color-Blindness.aspx http://en.wikipedia.org/wiki/5-HT_receptor https://www.erowid.org/experiences/exp.php?ID=23143 http://www.colourblindawareness.org/colour-blindness/types-of-colour-blindness/ http://www.color-blindness.com/2007/01/15/color-blindness-is-not-color-blindness/ http://www.nydailynews.com/news/national/washinton-man-cured-colorblindness-article-1.1584091#ixzz2tgfc0UiB http://en.wikipedia.org/wiki/Achromatopsia http://en.wikipedia.org/wiki/Dichromacy http://archopht.jamanetwork.com/article.aspx?articleid=627109 http://en.wikipedia.org/wiki/Charles_Bonnet_syndrome http://www.ncbi.nlm.nih.gov/pubmed/6980680?dopt=Abstract http://en.wikipedia.org/wiki/5-HT_receptor http://en.wikipedia.org/wiki/Shaken_baby_syndrome Image Credit: https://www.bigstockphoto.com/ru/video-77415392/the-human-eye-close-up-on-the-iris-ring-is-rotated%2C-colored-in-seven-basic/ https://www.bigstockphoto.com/ru/image-119253707/stock-vector-types-of-color-blindness-eye-color-perception-vector-illustration-on-isolated-background https://www.bigstockphoto.com/ru/image-15369659/stock-photo-%D0%A1%D0%BF%D1%8F%D1%89%D0%B0%D1%8F-%D0%96%D0%B5%D0%BD%D1%89%D0%B8%D0%BD%D0%B0-%D0%BB%D0%B8%D1%86%D0%BE-%D0%A4%D0%B5%D1%8F-%D0%B7%D0%B2%D0%B5%D0%B7%D0%B4%2C-%D0%BA%D1%80%D0%B0%D1%81%D0%BD%D1%8B%D0%B9-%D0%BE%D1%82%D1%82%D0%B5%D0%BD%D0%BE%D0%BA-%D0%B8-%D0%BC%