While Jonas may have dyed his hair for an important cause this time, he doesn't always need a reason to experiment with hair color. In 2015, he dyed his hair blue, leading to media speculation that it had something to do with his recent breakup with Gigi Hadid.
He explained to Between the Lines that there was no "deeper meaning" to his vivid hair color. "I just did it because I wanted to do it," he said. Jonas added, "I like having blue hair. I don't think I feel any different; it was just a spur-of-the-moment decision anyway. But I'm not gonna react or go after the press about it because I just find it funny."
Jonas has also experimented with pink hair before. Allure noted that he rocked a cotton candy pink hairstyle with baby blue highlights at the 2016 Kids' Choice Awards. He also appeared at the Grammys that year with a fuchsia crop of hair.
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