2 different recipes. Brands sell different pigment mixtures under this name, so they won't all look or mix alike. Compare the pigments below.
Who makes it
PB16 Metal-free Phthalo Blue1
- Old Holland Classic Oil Colours No. C232PB16LF ISeries C18 ml tube* · 40 ml tube · 60 ml tube* · 125 ml tube · 225 ml tube · 475 ml tin* · 1000 ml tin*About Old Holland
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.