Schwarzkopf tone breakdown

[Hairdresser28]

i am looking at buying some IGORA Royal colours. I assume the base 5/0 is the same universally? But can anyone break down the tones and numbers please. I currently use Wella so for example 5/1 is light ash brown

 

[JH_92]

1 - cendre (grey ash)
2 - ash (blue ash)
3 - matte (green ash)
4 - beige (muted gold)
5 - gold (yellow)
6 - chocolate (red, blue and yellow)
7 - copper (orange)
8 - red (red)
9 - violet (purple)