We had Italian ice in NJ years ago. I don’t think they sell it in many other states. They’ve got other similar though distinct products (Italian ice and water ice are totally different, you can tell).
It comes in different flavors. My favorite was blue. It didn’t taste like anything real, it tasted like the color blue. Nothing else has ever tasted like that.
Red is cherry, white is lemon, and there are other colors that taste like different fruits. Blue is just blue. It’s not blueberry, it’s not anything, it’s just its own unique thing.