There are no good nicknames for Blue ... unless maybe it's "Baby?"
Famous people named Blue:
Jazz trumpeter Blue Mitchell; model Lucky Blue Smith; novelist Blue Balliett; actress Dakota Blue Richards; singer Adele Laurie Blue Adkins (a.k.a. Adele).
Blue is especially favored among celeb babies: Jamie Oliver, Cher, Dylan Lauren, Beyonce, Alicia Silverstone, John Travolta, and Rosanna Arquette all have babies with Blue (or a variant spelling) as a first or middle name.
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