Kylie Jenner -- Tyga Hates to See Her Go ... (PHOTO)

But you know he's gotta love watching her leave.

Tyga wisely tailed Kylie Jenner in NYC as she debuted a new hair color Wednesday evening. Seeing as how she's snatched the family popularity crown ... we'd expect Kylie's sisters to be the green ones.

Looks damn good on her though.