Kingston Rossdale's feeling blue!

Always the young trendsetter, Gwen Stefani and Gavin Rossdale's 6-year-old son showed off a new blue 'do Tuesday at New York City's JFK airport.

Clad in a pirate-themed tee, red jeans and blue boat shoes, Stefani's oldest son accessorized his airport look with a smiley face arm tattoo and a hint of metallic nail polish, visible when he clasped mom Stefani's hand.

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This summer is not the first time Kingston has rocked the hue. In July 2011, the stylish tot debuted a bright blue mohawk and shaved sides. Kingston and his younger brother, Zuma, 3, are no strangers to boundary-pushing kid ensembles.

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Mom Stefani -- who helms her own L.A.M.B. fashion line, and teamed again with No Doubt to recently release "Settle Down," their first single in a decade -- has dressed them in everything from leggings to mini combat boots.

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Stefani and her Bush front man hubby Rossdale have long encouraged their boys to be free spirits, but Stefani admits it can be tough raising fashion-forward Kingston. "Kingston's whole thing is, 'I need, I need.' He is insane right now," she told Elle magazine when her son was 3. "We're just hoping for the best and that he's not going to turn out to be a freak, but we'll see."

This article originally appeared on PIC: Kingston Rossdale, 6, Dyes His Hair Blue