In l'oréal in our salon that is pretty basic :)
Majirel 8
7
6
5
9,1
for root retouches
Richesse 8.3 for lowlights
7.13 for rootstretch
And lightener with 30 vol for all freehand highlights, 40 only for paler results
20 for those who like buttery golden highlights,
9 vol in foil ending with...