Woolite for Darks Product Description Woolite revives colours and helps prevent dulling and fading, keeping clothes looking like new. Its unique triple-action formula: 1) Revives the colours of your dark clothes thanks to its new 'ColourBoost' technology, 2) Helps to protect from fading as it cleans without harsh ingredients, 3) Helps to prevent lighter colours from becoming dull due to its colour catching ingredients and mixed fabrics. Additionally, Woolite darks liquid detergent is super concentrated and has more washes per bottle. Same care for less.