Winsor and Newton Professional Watercolours With 96 colours, our Professional watercolour range offers bright, vibrant colours and unrivalled performance. Water colour more than any other medium relies upon the variable characteristics of the pigments used. Our Professional Water Colours use only the purest pigments, and are known for their brilliance, permanence and strength of colour. With 75 single pigment colours in the range, we offer the widest range of modern and traditional pigments for superb colour mixing.