What is argyria, a condition that turns skin colour to blue?

Dark Skin, Blue Eyes: Genes Paint 7,000-Year-Old European's Picture

Are Blue Eyes Sensitive To Light? It's Complicated

Mesolithic man reveals origins of blue eyes, lactose intolerance

Real-life 'Blue Man' dies after heart attack, stroke

Strange case of Paul Karason who turned himself blue due to colloidal silver

Bizarre 'Papa Smurf' resurfaces on the internet; know how overuse of colloidal silver caused a man to turn blue

Engineering a Solution to a Skin-Deep Problem of Blood Oxygen Measurements

Diffuse Melanosis Cutis

close up fish eye photo of a man with blue skin and a, Stable Diffusion

Neil Campbell - Upright Citizens Brigade