I want to let my hair grow out and not dye it anymore but the roots looks awful I have gray and brown mixed. I want to use the semi-permanent hair color my hair now is a light brown I used Color Oops to lighten it more but I'm not sure what color to color it with the semi-pernament ? I would like to have something that wouldn't be so noticeable with the gray roots growing out. Any suggestions ? Any help I would be Thankful :)