Colleen comes from an exceptionally accomplished dam line. Her siblings include internationally successful horses such as Colette (by Biscayo) and Cole Porter (by F-One USA), competing in Longines Ranking classes, as well as Colonia (by Action Breaker), who has successfully competed at 1.40 m level. Colleen is sired by the young and talented stallion Toemme de Regor (Chacco Blue × Cento). This highly interesting stallion comes from one of the finest dam line, with no fewer than 10 siblings competing in Longines Ranking classes.