3 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
PR177 Anthraquinone Red + PR254 Pyrrole Red1
- Holbein Artists' Oil Color No. H201PR177 PR254LF I TransparentSeries A20 ml tube · 40 ml tube · 50 ml tube* · 110 ml tube*About Holbein
PR149 Perylene Red1
- PR149LF I TransparentSeries 440 ml tube · 60 ml tube* · 225 ml tube · 1000 ml can*About Michael Harding
PR264 Pyrrole Rubine1
- Blockx Extra-Fine Oil Colours No. 212427
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.