I now know why I can't keep it straight
PB15: 1 is phthalo blue red shade
PB15: 3 is phthalo blue green shade
PB 15: 4 is phthalo turquoise so you think it's going in an ascending order progressively more green
but
PB 15: 6 is also a phthalo blue red shade just I guess not the same phthalo blue red shade as PB15: 1
It's been a weird day
So far
