Natasha Denona Stripped (337M) is a warm taupe with a metallic finish that is permanent in palette and retails for $29.00. In comparison, Chanel Lame Acier (37) is a cool pewter with a metallic finish that is limited edition and retails for $36.00.
Chanel Lame Acier (37) is 85% similar — it is less shimmery, darker, cooler.
