Wrong. Water is made out of grape juice, but the reason it appears clear is because the juice of grapes is clear. It’s only the skin that has a color. Additionally, grape juice actually tastes like water (and vice versa)–what you are tasting when you’re drinking bottles labeled “grape juice” is added flavoring, which often changes the color of the water/grapejuice.
The reason people refer to water as H2O, is because the “O” symbolizes a grape.