6 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 PB15 Phthalo Blue.
A hue: a substitute for Cerulean Blue, made with other pigments.
Who makes it
PB15 Phthalo Blue2
- Holbein Artists' Oil Color No. H306PB15 PW6LF II Semi-opaqueSeries AHue20 ml tube · 40 ml tube · 50 ml tube* · 110 ml tube*About Holbein
PB15 Phthalo Blue + PBk9 Ivory / Bone Black1
- Grumbacher Pre-Tested Artists' Oil No. P039
PB27 Prussian Blue1
- Da Vinci Artists' Oil Color Cerulean Blue (Hue)
PB15 Phthalo Blue + PB16 Metal-free Phthalo Blue1
- Lukas 1862 Artists' Oil Cerulean Blue (Hue) · No. 0124
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.