Pat McGrath Interstellar is a cool purple with a sparkle finish that is limited edition and retails for $25.00. In comparison, Natasha Denona Blue Dahlia (181DC) is a cool purple with a metallic finish that is limited edition and retails for $29.00.
Natasha Denona Blue Dahlia (181DC) is 90% similar — it is more shimmery, darker, cooler.
