L’Oreal Deactivateur 6, 9 or 15vol?

[Fullfatlatte]

Going to order L’Oreal Diarichesse colour (6.13) & not sure which vol activator to get. What’s the difference in the vols? TIA
My base is approx 6/7 but with very warm tone (which I hate!). Hopefully this 6.13 will give me a fab brown! Hair was last coloured with Inoa mid Dec. Thank you

Sorry meant 6.12!

Anyone know? Thank you

Bumping in the hope someone can advise? Thank you

6 for toning very sensitised hair, usually with dialight not richesse. 9 for normal coverage. 15 for white blending up to 30% and lift of up to 1.5 levels

In my head I always think “use 6 if hair needs a fix. Use 9 to add shine”
Haven’t thought of anything for 15 vol about white coverage lol

Thank you 🙏