The "Traffic Light" system of consent had its origin in #kink and #BDSM, now it is used in Pen and Paper rounds like #dungeonsanddragons. A history by linguist Katelynne Shimkus (@HwaetHwug) reveals its way into the mainstream.
https://languageatplay.de/2023/05/10/traffic-lights-in-hell-using-the-language-of-consent-in-dd/