 The riband is a four @-@ inch ( 10 @.@ 16 cm ) -wide sash worn over the left shoulder , or pinned beneath it , to the right hip , and was introduced in the 17th century by King Charles I. The riband 's colour has varied over the years : it was originally light blue , but was a dark shade under the Hanoverian monarchs . In 1950 , the colour was fixed as " kingfisher blue " . A member will wear only one riband , even if he or she belongs to several orders . The riband is not used when the collar is worn . 
