sky blue

• sky-blue

sky blue (comparative more sky blue, superlative most sky blue)

Blue sky is sky blue.

1. Of a vibrant light blue colour, like that of the sky on a fine day.

sky blue (countable and uncountable, plural sky blues)

1. A vibrant light blue colour, like that of the sky on a fine day.

   sky blue:  

2. (UK, slang, obsolete) Milk excessively diluted with water, or from which the cream was too closely skimmed.
   • 1800, Robert Bloomfield, The Farmer's Boy

     Hence, Suffolk dairy wives run mad for cream,
     And leave their milk with nothing but the name;
     Its name derision and reproach pursue,
     And strangers tell of three-times-skimm'd sky-blue.

• (blues) blue; Alice blue, aqua, aquamarine, azure, baby blue, beryl, bice, bice blue, blue green, blue violet, blueberry, cadet blue, Cambridge blue, cerulean, cobalt blue, Copenhagen blue, cornflower, cornflower blue, cyan, dark blue, Dodger blue, duck-egg blue, eggshell blue, electric-blue, gentian blue, ice blue, lapis lazuli, light blue, lovat, mazarine, midnight blue, navy, Nile blue, Oxford blue, peacock blue, petrol blue, powder blue, Prussian blue, robin's-egg blue, royal blue, sapphire, saxe blue, slate blue, sky blue, teal, turquoise, ultramarine, Wedgwood blue, zaffre ^{(Category: en:Blues)}

• (diluted milk): 1873, John Camden Hotten, The Slang Dictionary

• sky blue on Wikipedia.Wikipedia

• blue sky, blue-sky