Delacroix is the final foal of Tepin (Bernstein), a five-time top-level winner whose victories included the Grade 1 Breeders' Cup Mile and the Gr.1 Queen Anne, and who died aged 12. She is also the dam of Grateful (Galileo), winner of the Gr.1 Prix de Royallieu and a Group winner in Ireland; they are her only two winners. Tepin is a full sister to Prime Cut, a triple winner in the US placed at Grade 2 level.

Second dam Life Happened (Stravinsky) never raced and bred five winners. She is also the dam of Vyjack (Into Mischief), winner of four graded stakes, three of them at Grade 2 level, and third in the Grade 1 Forego Stakes.

Third dam Round It Off (Apalachee) won in the US and was placed in black-type company and had four winners from four runners, among them the sire Disco Rico (Citidancer), a dual Grade 3 winner in the US.