Pat McGrath Blue Blood is a warm plum with a metallic finish that is permanent in palette and retails for $25.00. In comparison, Natasha Denona Smoky Plum (23P) is a warm plum with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Smoky Plum (23P) is 80% similar — it is less shimmery, lighter, cooler.