Which brand of (boxed do-it-yourself) hair dye is the best for an older woman with slight gray hairs?

My mom is 48, and she is starting to get gray hair throughout.


She doesn't want to mess her hair up because she works at the government, so which brand, or product of boxed hair dye works the best for gray coverage?





NOTE:


Also, she has dark brown, border line blackish hair, which is curly, and slightly thick, so it can't be a product with a selection of all lighter hair dye only.


thank you so much if you can help us ! (:Which brand of (boxed do-it-yourself) hair dye is the best for an older woman with slight gray hairs?
I'd go with L'Oreal. Maybe Garnier.Which brand of (boxed do-it-yourself) hair dye is the best for an older woman with slight gray hairs?
I agree with L'Oreal...they make good products to use at home.