The flag was created by FANDOM user RoseWatera on the 24th of December, 2020. The cyan stands for masculine genders, the ash cyan stands for non-conforming men, the light pink is for femininity and the hot pink is for non-conforming femininity.
The term Rosbian was coined for transmasculine individuals who express femininity for the reason of many of them getting discriminated against, fake-claimed, and are afraid of coming out as trans/coming to terms with their identity due to being too feminine.
Rosbian was coined by FANDOM user RoseWatera on December 24th 2020. It's original FANDOM LGBT wiki page was the original source of the term, but it has since been deleted. RoseWatera posted the flags and all coining information on his Tumblr "crying-roses" as an additional/replacement source.