Kim Kardashian just went back to the dark side.

With Kylie Jenner going blonde, her older sister went back to her old ways -- showing off newly darkened locks today on her social media accounts.

"I'm back," she posted on Twitter, along with one pic of her brunette hair. "Love change," she added on Mobio -- along with the photo above.

When asked by fans later if she'd ever consider going back to blonde, she responded "absolutely! i loved it!"

But what about you -- which look do you prefer? Vote in the gallery above!

Kim later stepped out with sister Khloe Kardashian to visit a spa in Sherman Oaks, California -- showing off her new 'do and killer post-baby bod.

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