From Wookieepedia, the Star Wars wiki.
"Green Hair" was the name Darsha Assant gave to one of the leaders of the Raptor gang.
He was a Human male, lean and wiry of build, with a shock of green hair kept up in an electrostatic field. Lorn Pavan referred to him as "Fashion Plate."
- Darth Maul: Shadow Hunter (First appearance)