The theoretical examination of the geometric, energetic, phonon and optoelectronic properties of cubic and hexagonal A2AgCrCl6 (A = Cs, Rb, K, Na, Li) using meta-GGA SCAN-rVV10 has led us to identify cubic Cs2AgCrCl6 and Rb2AgCrCl6 as two dynamically stable double perovskites, with impressive optical features.