Advice from Christophe Robin - Expert Colourist for L'Oreal Paris.
I recommend Excellence Creme for women who want perfect grey coverage. I love the non-drip creme texture, because it feels really rich and is easy to apply.

My top tips for successful application:
Your colour will take better on hair that's been well prepared: always use the Pre-Colour Protective Treatment, developed for fragile hair, before colouring. This will help achieve even results.
To enhance the look of your colour after application, rinse your hair without using shampoo then apply the After-Colour Protective Conditioner.
Finally, rinse out the conditioner with cold water for extra shine.