is throwing it back to her "King Kylie" era ... cause she's rocking pastel pink hair again!

The beauty/makeup mogul showed off her new bubblegum-pink dye job in a TikTok clip Tuesday ... clearly feeling herself as she posed away in her car -- adding in the caption this year was all about rocking 2014 vibes.

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She also shared IG selfies of the new hairdo ... asking fans if they remembered her -- and sure enough, they did as they left thrilled comments over her comeback look, which she's also revisited in 2016 and 2018.

Kylie owes her candy-colored hair a lot ... it kickstarted her IG fame a decade earlier ... with her lip fillers adding to the mass hysteria surrounding the then-teenager's image the following year.

While she's experimented heavily with her hairstyle, the quirky splashes of color took a backseat over the last year ... as she sported a more natural dark brown hair look.

You could argue she might've opted for this to keep things fresh and spicy with her acclaimed Hollywood actor BF, . Either way, whatever the reason is for the switch-up .

.. her fans are loving it online ... "King Kylie" is trending right now on Twitter.

This whole period of her rockin' colorful hair was a time when she was blowing up in fame -- and when people really got to know her in her own right as an up-and-coming KarJenner.

We'll say this ... she's definitely making a splash again, and showing off some personality.

Talk about being in the pink, huh?