3 different recipes. Brands sell different pigment mixtures under this name, so they won't all look or mix alike. Compare the pigments below; the most common is PB29 Ultramarine Blue + PBk9 Ivory / Bone Black.
Who makes it
PB29 Ultramarine Blue + PBk9 Ivory / Bone Black2
- Holbein Artists' Oil Color No. H357
PB27 Prussian Blue + PG7 Phthalo Green + PR264 Pyrrole Rubine1
- Lukas 1862 Artists' Oil No. 0186
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.