According to a Swedish blog about orders and medals, Prince Daniel and Prince Carl Philip wore the order of the Polar star yesterday evening. According to sources at the Royal Court the King has decided that Princes of Sweden (therefor not Christopher O'Neill) will wear the order in the black ribbon, that was used before 1975. Personally I hope that they change to the black ribbon for all classes/grades.
Link to the blog, in Swedish:
Nordstjärneorden is the new black | jonar242