The singer has also dyed his hair pink.
The hair color looks good on him, but Jonas' new hairdo is not just a fashion statement.
Jonas unveiled the new look in his Instagram Story at the beginning of the month (viaAllure).

Per the website for theNational Breast Cancer Foundation, the month of October is Breast Cancer Awareness Month.
The month “is an annual campaign to increase awareness of the disease.”
He explained toBetween the Linesthat there was no “deeper meaning” to hisvivid haircolor.

“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.
He also appeared at the Grammys that year with a fuchsia crop of hair.