Blue Hair Club
Blue Hair Club is a phenomenon that occurred in 2016 when Lainey announced she had a thing for girls with blue hair.
Details
After Greg and his wife Lainey broke up with Billie, who had blue hair, in November 2016, they began uploading videos judging if they would date girls who submitted their photos to Onision XYZ based on appearance. In one of the videos, Lainey mentions she has a thing for girls with blue hair. Afterword, some of Lainey and Greg's loyal followers dyed their hair blue or talked about plans to dye their hair blue. It was also revealed they had been talking to at least two blue haired girls (LuxyMoo and MilkAnon) to potentially be part of their relationship.
In late November, Billie announced on social media she would be dying her hair a different color. Some believed this was meant to be a symbol of her detaching more from Lainey and Greg, similar to the haircut video she made shortly after their break up where she said she "felt in control for the first time in a long time". (Source) It was soon revealed Billie's new hair color is dark blue and soon she was back together with Greg and Lainey.