I think you've made the right choice with the orange - that'll really pop and works well against the silver frame. Will you be adding any logos? If so, what font have you chosen? Classic sixties, seventies parallel lines or eighties Cagiva style?
There's a similar look on this custom mark 1 Multistrada, which seems to have the same tank as yours but I much prefer your frame/bodywork colour combo.
https://www.bikeexif.com/ducati-multistrada-cafe-racer
