red dyed hair, what to do about roots?

Hello.

Okay, so I dyed my dark brown hair a lighter reddish brown, last week, and it turned it even darker brown with some red tones. Too dark for me. So, I used loreal color removal and then dyed it a red color and LOVE it!

So, my question is...what am I going to do about my dark brown roots coming in. I know I can't use the same dye I used on colorfixed hair b/c it won't come out nearly as light. And I can't colorfix my roots b/c they won't have color on them. 

What will I do?
Thanks!