The Cotman Watercolour range offers a more uniform consistency compared to the Artists' Watercolour range, making it easier for beginners to use without needing to understand the nuances of each individual pigment. Raw Umber is a rich brown pigment made from the natural brown clays found in earth. It was named after Umbria, a region in Italy where it was mined. Additionally, the Cotman Watercolour range corresponds with the Winsor &; Newton Artists' Watercolour range. For example, Burnt Sienna has the same hue in both ranges, allowing artists to seamlessly mix colours from both with minimal technique adjustments. Series 1.