Celestial blue
From Tardis Wiki, the free Doctor Who reference
Celestial blue was a shade of blue with a hint of grey.
Rogue, a bounty hunter, wore a celestial blue cravat on 1813. (TV: Rogue)
Roz Forrester, the Silurian singers Jacquilian and Sanki, Sherlock Holmes and John Watson wore celestial blue waistcoats to the wedding of Bernice Summerfield and Jason Kane on 2010. (PROSE: Happy Endings)