I have colored my hair several times at home (never at a salon) with various drugstore brand dyes, but I'm really quite a newbie. I've always gone darker from my natural dark brown so I've never had a problem. Today I decided to go one shade up to medium brown since my hair generally gets naturally a little lighter in the summer with some reddish highlights, etc. I tried Garnier Nutrisse 535 Chocolate Caramel and while it has given my hair a nice reddish golden tint, it also lightened my roots much more than the length of my hair. They're almost pink! It could be from my own uneven application, I don't know, but I know that I don't like them! Any advice? Could I use one of those root touch up products just on the roots in a darker color, or, at least... how long do I have to wait to re-color a darker shade (i.e. back to my natural color). Any advice is greatly appreciated! TIA!