Lime Crime launched its first 13 shades - which took three years to develop - earlier this year. Some of the highly-anticipated shades sold out in just two weeks.
Now the brand - which is hugely hyped on social media - has added eight new shades to its line-up.
The new shades include three full coverage colors (Bubblegum Rose, Valentine and Aesthetic) and five tints (Tweet, Mint Ice, Cloud, Kawaii and Moonchild).
Lime Crime CEO and Founder, Doe Deere, said: "Unicorn Hair was my hair dye dream come true, and I am thrilled Lime Crime fans love it just as I do.
"I cannot wait to see how our unicorns rock these new shades!"