Easiest way would be to add a bit of blue food coloring. The white of the milk and volume of it should dilute the blue from dark to a pale blue liek we see.
Looks like your bang on Lance!http://www.starwars.com/news/5-blue-milk-recipes-for-star-wars-dayI read today its Bantha Milk! Yuk!
Joke: what temperature should blue milk be served at? Think about it!
OK i'll tell you: Luke warm!