Ancient Maya would paint unlucky people blue and throw them down a sacred well as human sacrifices.
www.livescience.com/2322-secret-mayan-blue-paint.html
…after a variety of rituals were anointed with blue dye and either shot with arrows through the heart or held on an altar while the priest swiftly removed the heart using a ceremonial knife. In either case the heart was presented to the temple idol, which was also anointed with blood.[16] According to Bancroft, one tribe sacrificed illegitimate boys twice a year, again by removing the heart, but collecting the blood in a bowl and scattering it to the four cardinal compass points within the temple.
https://en.wikipedia.org/wiki/Sacrifice_in_Maya_culture