A new cultivar of Dahlia plant named ‘KH72214-08’ that is distinguishable by its compact upright plant habit, and dissected leaves and leaflets which are very dark green, almost black in color. The inflorescence of ‘KH72214-08’ is classified as a Collarette form of Dahlia in which a single outer whorl of bicolored orange and orange-red ray flowers, and an inner whorl of mauve-pink petaloid stamens, are arranged around a central cluster or disc of disc florets. The central disc of the inflorescence of ‘KH72214-08’ is initially dark red in color until the disc florets are fully developed and exhibit their dark yellow stigmas. After one year of growth, plants of ‘KH72214-08’ are 55 cm in height and 35 cm in width. ‘KH72214-08’ is hardy in USDA Zones 9 and higher.