Garnier Olia 4.15 – Dark Soft baks Garnier June 10, 2015 Garnier Olia 4.15 – Dark Soft Mahogany: This hair dye of the most beautiful brown hair. In fact, the name Mahogany. The name of a tree. A natural hair color. Hair dye our hair shines.This hair color goes well with white-skinned brown-eyed women. 4.15