The real hair color of Billie Eilish is dark brown, although she often experiments with vibrant and outlandish colors in her hairstyles.
At the beginning of her career, she was known for her neon green hair, which she often covers with a wig or a hat, depending on the music video or the event.
But more recently, Billie's hair hue is dark brown, and you can see this in her "Bad Guy" and "Everything I Wanted" music videos as well as in her appearances on talk shows such as The Ellen Show, The Tonight Show, and The Late Late Show.
In fact, she recently dyed it a subtle gray balayage tone, which she wore for her performance of "When the Party's Over" and "No Time to Die" at the 2020 Brit Awards.
You can find out more about Billie's different hairstyles on her website or Instagram account, which are packed with colorful, creative looks for her to try!
