Indus Valley Bio Organic Dark brown Hair Color which is commonly used by people it gives you natural hair color without a chemical and also it is a complete hair treatment it gives you color, prevent hair loss, dandruff, suitable for hypoallergenic people. It does not contain Chemical, synthetic fertiliser or pesticides. Indus Valley Bio Organic Soft Black Hair Color is USDA, Ecocert & 100% Organic Certified Hair color. As it contains Henna (Lowsonia Inermis), Indigo (Indigofera Tinctoria), Colourless Henna (Cassia Auriculata). combination of these three herbs gives you black hair colour in just 40 miniutes.