Mixed from three paints: Titanium White, Lemon Yellow and Quinacridone Magenta.
Drag a bar to change how much of that paint goes in, and watch the colour change at the top.
Parts are a ratio: a drop, a spoonful, whatever suits the amount you need.
Pure white can't be mixed: it's the one paint you have to buy. Warm white is Titanium White with a touch of yellow and red.
The library and every recipe here are mixed from just these.