Why Does Blue Tea Change Colour? The Science Behind the Magic One of the most fascinating things about Blue Tea isn't just its beautiful deep blue colour—it's the magical transformation that happens when you add a few drops of lemon juice. Within seconds, the vi... Anthocyanins Blue Tea Blue Tea Science Blue Tea with Lemon BlueTeaBuy Butterfly Pea Flower Butterfly Pea Flower Tea Colour Changing Tea Herbal Tea