Rider in Blue (Swedish: Ryttare i blått) is a 1959 Swedish mystery thriller film directed by Arne Mattsson and starring Annalisa Ericson, Gunnel Broström and Bengt Brunskog. It was shot at the Centrumateljéerna Studios in Stockholm and on location at Bromma Airport and Strömsholm Castle. The film's sets were designed by the art director Bibi Lindström. It was the third in a series of five films featuring the husband and wife detective team John and Kajsa Hillman. It was followed by The Lady in White in 1962.