It looks like engine oil to me, but the AI rates it as purple. It's an obi締め (decorative cord for a kimono) that looks like braided cord. 128cm Since there isn't much deterioration, I think it's leather, but it might be synthetic leather. Please understand that this has been stored at home for a long time. Thank you. - Color: Braided purple and beige - Material: Leather? - Design: Braided design for obi締め Thank you for viewing.