Rejoice, brunettes! No longer must you suffer the summer-long tyranny of blondes with trendy, cotton candy-colored hair. Now you too can look like you dip-dyed your skull in a rainbow thanks to a killer new bleach-free technique called the "oil slick," which gives dark hair a colorful, iridescent sheen that has some pretty gorgeous results.

The technique, which aims to mimic the swirly, inky colors found in an oil spill, was spearheaded by celebrity colorist Aura Friedman of the Sally Hershberger Salon, and won't destroy your precious strands.

"It will [be] great for people who naturally have dark hair and don't want to go through a major bleaching process," Aura explained in an interview with Popsugar. "You don't have to lighten it so much to get it there, so your hair will be in better condition."

In other words, you can change your hair as often as Kylie Jenner and be A-OK.

Aura also revealed the inspiration for the oil slick technique, saying, "I've been trying to re-create gasoline or oil when it's on the ground and it rains. I find that when you take a dark purple and a dark green and layer them one on top of the other, you end up with this iridescent feeling."

The effect is kind of jaw-dropping, no?

Another bonus for brunettes who decide to go with this bold look? The deep, rich colors are not only perfect for fall, but will last months longer than their pastel counterparts.

This trend is sure to guarantee any and all brunettes an Instagram worthy 'do, so give it a try! According to Aura, just make sure to ask your colorist for "a shiny, blackish base with color peeking through."

Happy dye-ing!