Purple tea is fairly new to the tea world. It was created in Kenya to be a drought-resistent, pest-resistent hybrid that has anthocyanins in its leaves. "Anthocyacins are an antioxidant that fight free radicals and give the camellia sinensis plant a purple tint. (They’re the same thing that give blueberries and acai berries their blueish purple color.)"
If you are looking for something unique this might be something new to try.
Happy sipping!