Raw Sienna is a bright brown pigment. One of the oldest pigments, it can be found in prehistoric cave art. It is named after Siena, Italy where the pigment was sourced during the Renaissance.

Cotman Watercolours use fine art pigments with reduced pigment load than the Professional Watercolour range, making them an accessible choice while still uncompromising on quality. Rated AA and A for Excellent and Good lightfastness, Cotman Watercolour gives artist the reassurance expected from a quality watercolour range.