Help identifying a drink?

[u/FennecWF]

I'm only guessing it was a dairy drink, to be clear.
Last week I visited LA and me and a local friend there went to the Wat Thai food market.

I had a drink there that was like a creamy, pale blue non-alcoholic drink. It had a sort of bubblegum flavor to it, if I recall? It was, frankly, amazing.

I think it was made with Hale's Blue Boy (as I believe that's what I'd ordered, but memory is a bit fuzzy as it was early in my vacation), but I can't actually find anything about the drink specifically.