Embrace your inner ice queen or king, and liven up your locks with Lime Crime’s pigment-packed, ultra-conditioning blue hair dyes. For electric blues and head-turning teals, try our Unicorn Hair Full Coverage collection, which saturates strands with high-impact color for a bold new ‘do. If you want something more subtle—think light blue colors and pretty pastels—try our Unicorn Hair Tints, which offer a more muted hue. Our DIY-friendly formulas are damage-free, so you can change up your blue hair whenever the mood strikes. Keep reading to learn more about our semi-permanent blue hair dyes and how to use them for a magnificent mermaid mane.