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
PO73 Pyrrole Orange + PY42 Yellow Iron Oxide + PY74 Arylide Yellow 5GX1
- Williamsburg Handmade Oil Colors No. 6000463PW6 PY42 PY74 PO73LF I OpaqueSeries 237 ml tube · 150 ml tube · 8 fl oz can* · 16 fl oz can*About Williamsburg
PR108 Cadmium Red + PY35 Cadmium Yellow1
- PW6 PY35 PR108LF I OpaqueSeries 140 ml tube · 150 ml tube · 300 ml cartridge · 500 ml tin · 1000 ml tin* · 4000 ml tin*About Art Spectrum
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.