Pat McGrath Blitz Violet Orchid is a cool purple with a metallic finish that is permanent in palette 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 85% similar — it is darker, cooler.