White lead pigment as the name suggests was made by grounding up lead into a powder. Many painters got lead poioning from it which moves into your nervous system and messes up your caslium production causeing mental dissiblitys and high blood pressure. White lead wasn't officaly banned until the 1970's.
Scheele's green contianed one of the most deadly chemicals ever disscovered known as copper arsenite and it was used in furniture, childrens toys, clothing, candy, paper, medisine and wallpaper. Exposure to this toxic color caused skin lesions, vomiting, diarrhea, and in some cases, cancer. It was finaly banned in the 1800's.
Cadmium red had a rare material in it so it was prized amoung artists. The Cadium makes many pigments britter and more vivd but when artist were washing cadium red off their brushes it poullted the water supply. Therefore it is faceing a european ban.
School bus yellow was created to make school buses more uniform but the color contianed chromium which feeds off electrons. It gets these electons by feeding off DNA. Exposeure caused ichiting, burning sensions, coughing, snezeing, and nose bleeds.
Uranium yellow dates all the way back to the birth of christ. Painters useing this paint pressed the brush agiast their lips, to get a ponit, unware of the radiodation they were exposing themsevles to. Exposeure to uranium caused damage to your kidneys, liver, and blood cells.