Colourflux

You target one object or creature within range, and choose a colour that it changes to. This affect is permanent until dispelled.

If cast upon a creature, they must make a Constitution saving throw equal to your spell save, or their appearance changes to desired colour. Alternatively, they can choose to willingly fail, and choose a colour themselves.

At its base level (1st level), the spell can target objects or creatures up to Large size. For each spell slot level above 1st used to cast this spell, the maximum size of the target increases by one category (e.g., Huge at 2nd level, Gargantuan at 3rd level).