Chanel Chestnut (122) is a warm brown with a semi-matte finish that is permanent and retails for $40.00. In comparison, YSL Shoreditch Walk (144) is a warm brown with a luminous finish that is permanent and retails for $38.00.
YSL Shoreditch Walk (144) is 90% similar — it is more shimmery, darker, glossier.
