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At this point, rainbow hair color is more than just a trend; it's grown into a category of its own. Now it's just as common to see someone rocking pastel or neon hair as it is blond or brown. It's ...

This technique is a riff on the now-classic ombré hair highlighting technique. Instead of your natural color gradually lightening towards the tips, however, your strands shift to a rainbow hue. This ...

An curved arrow pointing right. Following is a transcript of the video. Narrator: Hairstylists across the US have been using vivid hair dyes on clients to create unique looks like rainbow underlights, ...