Illamasqua Alluvium is a cool blue with a metallic finish that is permanent and retails for $25.50. In comparison, Natasha Denona Metallic Steel Blue (11M) is a cool blue with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Metallic Steel Blue (11M) is 95% similar — it is more shimmery.
