Blue Stripe is out of Blues for Sale (Not For Sale), a multiple Group winner in Argentina with three Group wins, including at Group 2 level, who has nine winners from nine runners. Blues for Sale is also the dam of Blue Prize (Pure Prize), winner of the Grade 1 Breeders' Cup Distaff in 2019, a Group 1 winner in Argentina and a multiple Grade 1 winner in the US, and of Baron Blue (Orpen), a five-time winner placed at Group 3 level.

Second dam Key Cure (Cure the Blues) won five races. She is also the dam of Cure For Sale, a full sister to Blues for Sale, who won at Listed level and was placed several times at Group 3 level, and of the winner Far Away Eyes, dam of Far Away Love, a Group 2 winner placed at Group 1 level. Key Cure is a half-sister to Key Saga (D'Accord), a winner who was Listed-placed in the US.

Third dam Dancers Key (Key To The Mint).

Blues for Sale has a 2-year-old filly named Blue Coast (Suggestive Boy).