Be seated

I have always enjoyed this chair; it has always seemed like an empty canvas to me, but, for that very reason, it has become dirty over time. However hard I try to keep it spotless, my dog somehow decides to perch on it. Now it’s been turned into a work of art, so hopefully no one will ever sit on it. Can’t be sure about Pepper, though! Do you think I should leave it as is or add some colors?