Hairdressers!! What is this hair colour?

[ChickOnAMission]

Any tips on what colour to go for if I want the same hair colour as Keira knightly?

I'm doing a home job so something I can buy in a chemist or if anyone can recommend a professional colour I can use at home?

I'm looking for the number I.e 6 or 6.5 etc...

Thanks!

My hair is brown anyway so it's not a drastic change. And I normally use a semi.