sky-blue

from WordNet (r) 3.0 (2006)

sky-blue
    adj 1: of a deep somewhat purplish blue color similar to that of
           a clear October sky; "October's bright blue weather"
           [syn: {azure}, {cerulean}, {sky-blue}, {bright blue}]
    n 1: a light shade of blue [syn: {azure}, {cerulean},
         {sapphire}, {lazuline}, {sky-blue}]

from The Collaborative International Dictionary of English v.0.48

Sky-blue \Sky"-blue\, a.
   Having the blue color of the sky; azure; as, a sky-blue
   stone. --Wordsworth.
   [1913 Webster]