Highland Chief is out of Pink Symphony (Montjeu), a Group winner in Ireland and multiple stakes-placed in England, who won the Gr.3 Irish Stallion Farms E.B.F. Give Thanks Stakes over a mile and a half in 2011. He is a half-brother to the dual winners Pink Phantom (Oasis Dream) and Tartan Chief (Dark Angel) and to the winner African (Dubawi).

Second dam Blue Symphony (Darshaan) is also the dam of Fantasia (Sadler's Wells), a multiple Group winner who was multiple Group 1-placed. Fantasia won the Gr.3 Prestige Stakes, the Gr.3 Nell Gwyn Stakes and the Grade 3 Modesty Handicap, was placed in the Gr.1 Fillies' Mile, the Gr.1 Poule d'Essai des Pouliches and the Grade 1 Just A Game Stakes, and is herself the dam of a Group 3 winner, Berlin Tango (Dansili), who took the Gr.3 Classic Trial. Another daughter, the juvenile winner Blue Rhapsody (Cape Cross), is the dam of Western Hymn (High Chaparral), a multiple Group winner who won the Gr.2 Prix Eugene Adam and was placed three times at Group 1 level.

Third dam Blue Duster (Danzig), grandam of Pink Symphony, was Europe's champion two-year-old filly of 1995 and won the Gr.1 Cheveley Park Stakes. Blue Symphony is one of her three winners, and her unraced daughters produced Natalie's Joy (Lope De Vega), winner of the Listed Rose Bowl Stakes, Annie's Fortune (Montjeu), third in the Gr.3 Oh So Sharp Stakes, and Chili Flag (Cityscape), second in the Listed Prix Saraca.

Pink Symphony has a two-year-old full brother to Highland Chief and a yearling filly by Churchill.