The problem with natural coloring is the unwanted taste - it gonna be the one of the coloring ingredient. Especially this relates to that mad amount of orange zest added, which made my throat cringe due to the extra plenty of aroma oils.
A good purple pink can be achieved by beetroot powder, and if used in small amounts there’s no taste 😊 For ‘grass’ green there’s another (can’t remember the name for it) but it’s an herb made into a powder. Don’t think you’ll find these in your everyday supermarket, however, usually bulk buy stores will sell them (I don’t like Costco but like distributions stores).