Natasha Denona Gray-Brown (38M) is a cool taupe with a frost finish that is permanent in palette and retails for $29.00. In comparison, Natasha Denona Deep Slate Gray (32P) is a neutral taupe with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Deep Slate Gray (32P) is 85% similar — it is less shimmery, darker.