Winsor & Newton Cotman Water Colour is a highly popular range of affordable watercolours that spans a spectrum of 40 bright and beautiful colours. Cotman Water Colours have good transparency excellent tinting strength and good working properties. Both high quality pigments and more affordable alternatives have been selected to ensure the best value without compromise on quality. Designed to mix a large number of colours Winsor & Newton have achieved this by selecting colours based on mass tone under tone and the character of the pigment itself. 8ml tubes.