Hosta

Cobalt blue is a type of color pigment. Additionally, it may refer to:

Animals

• Cobalt blue tarantula, a type of tarantula
• Cobalt Blue Mbuna or Cobalt Blue African Cichlid, a type of fish
• Cobalt Blue (horse), winner of the 2007 San Felipe Stakes

Fiction

• Cobalt Blue (comics), a comic book character appearing in books published by DC Comics
• Cobalt Blue (novel), a 2013 Indian novel by Sachin Kundalkar
• Cobalt Blue (film), a 2022 Netflix adaptation of the Kundalkar novel

Other uses

• Cobalt blue (RAL), a RAL color
• Cobalt Blue (album), 1992 album of ambient electric guitar music by Michael Brook
• Cobalt blue glass, a type of glass