Kate Middleton is one of the best-dressed women in England - it's kind of her job. And she's exceptionally good at it - likely because she has a) all the money, and b) a team of fashion designers and consultants to help her with her sartorial decisions.
And while she's been seen in public wearing just about every color of the rainbow and then some, there's one color she's never been seen wearing: orange.
Harper's Bazaar Australia actually checked: looking through the photo archives from all eight years Kate has been the Duchess of Cambridge, she's never once been seen in public wearing orange.
Officially, there's no answer. But that won't stop this Inquisitr writer from getting into some wild speculation.
Deference To Another European Royal House?
You are probably aware that the monarchy of the United Kingdom is not the only extant monarchy in Europe. They may be the biggest and most well-known, but they are joined by Belgium, Denmark, Norway, Spain, Sweden, and the Netherlands (to say nothing of a couple of principalities ruled to varying degree by hereditary peers).
Anyway, over in the Netherlands, the royal family there is known as the House of Orange-Nassau, and the family's official color is orange, for reasons that would require pages and pages of exposition to explain (just take my word for it).