2 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 PB28 Cobalt Blue.
Who makes it
PB28 Cobalt Blue19
- M. Graham Artists' Oil Color No. 090
- Grumbacher Pre-Tested Artists' Oil No. P049
- Holbein Artists' Oil Color No. H301
- Williamsburg Handmade Oil Colors No. 6000927PB28LF I Semi-opaqueSeries 737 ml tube · 150 ml tube · 8 fl oz can* · 16 fl oz can*About Williamsburg
- PB28LF I Semi-opaqueSeries 540 ml tube · 60 ml tube* · 225 ml tube · 1000 ml can*About Michael Harding
- Old Holland Classic Oil Colours No. E250PB28LF ISeries E18 ml tube* · 40 ml tube · 60 ml tube* · 125 ml tube · 225 ml tube · 475 ml tin* · 1000 ml tin*About Old Holland
- PB28LF I Semi-transparentSeries 440 ml tube · 150 ml tube · 300 ml cartridge · 500 ml tin · 1000 ml tin* · 4000 ml tin*About Art Spectrum
- PB28LF I Semi-opaqueSeries 640 ml tube · 110 ml tube · 300 ml tube · 1000 ml tin · 4000 ml tinAbout Langridge
- Blockx Extra-Fine Oil Colours No. 212652
- PB28LF I Semi-opaqueSeries 220 ml tube · 40 ml tube · 60 ml tube · 200 ml tube* · 500 ml tin*About Royal Talens
- Lukas 1862 Artists' Oil No. 0125
PB28 Cobalt Blue + PB29 Ultramarine Blue1
- Daler-Rowney Georgian (student)Student No. D111014110
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.