Yes, I like the light tone of the ball—less knowledge of what's going to happen later and more of an immediate sense of things as they are in this historical moment, which works well.

Oh dear, those chamber-pots are a good historical detail!

I suppose Ewen's hair being powdered would affect what colours he might wear with it—amber-colour and grey could go together fairly well. But I don't have any idea about eighteenth-century colour tastes either!