Art Spectrum Artists Watercolour Paint Cerulean Blue S4Art Spectrum Cerulean Blue is a semi opaque blue and has a low tinting. Spectrum Cerulean mixes well with other shades of blue and is often used by artists to produce skies in landscape work. In accordance with proven traditional methods of production, all Art Spectrum Artists Watercolours are carefully stone milled to enhance the individual brilliance of each selected permanent pigment and to maximise its handling qualities. Successful watercolours