From Wikimedia.
Anne Hyde's dress is similar to the casual artist's studio dress seen in the last image. Mary's dress is more appropriate for wear outside of a studio.
Keywords: 1661, Lely, Anne Hyde, Queen Mary II, Queen Anne, Hyde family, Stuart family, Orange family, Duchess, Queen, British, hurluberlu coiffure, proto hurluberlu coiffure, off shoulder scoop neckline, chemise, elbow length puffed sleeves, slashed dress, bertha, quarter length puffed over-sleeves, necklace, earrings, brooch, clasps