To avoid that halo effect, do this instead: Start off by applying hair color only from your roots to any regrowth. Then, about five minutes before washing the dye out, pull the color through to the ends. (I like to use a wide-tooth comb to distribute.) If your hair still looks a little one-note after following this tip, break it up by painting on a lightening product for easy DIY highlights, or head to the salon for a professional foiling treatment.
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