'Though contemporaries had a great deal to say about Margaret of Anjou, complimentary and otherwise, scarcely anyone troubled to write about such a mundane detail as her personal appearance. The most detailed description is a secondhand one, which appears in a letter from Raffaelo De Negra to Bianca Maria Visconti, Duchess of Milan, dated October 24,
1458: “The Englishman told me that the queen is a most handsome woman, though somewhat dark [my emphasis] and not so beautiful as your Serenity.” ’
http://www.susanhigginbotham.com/blog/posts/so-what-did-margaret-of-anjou-look-like/