Blue Is The Warmest Color

"Blue is the Warmest Color is a graphic novel about growing up, falling in love, and coming out. Clementine, a high school student, has an average life: she has friends, family, and the romantic attention of the boys in her school. When her openly gay best friend takes her out on the town, she wanders into a lesbian bar where she encounters Emma: a punkish, confident girl with blue hair. Their attraction is instant and electric, and Clementine finds herself in a relationship that will test her friends, parents, and her own ideas about herself and her identity"-- from publisher's web site.
After breaking up with her boyfriend when she cannot reciprocate his feelings for her, Clementine goes to a gay bar with her friend where she becomes captivated by Emma, a punkish girl with blue hair.

A tenderly told graphic novel for adults about a young woman who becomes captivated by a girl with blue hair.