Sennelier l'Aquarelle Watercolor Tubes 10ml - French Ultramarine Blue 10ml Tube High lightfast and permanent made with Kordofan gum arabic and honey binder Perfect for luminous watercolor washes, rich and brilliant colors, and discerning watercolor artists A traditional yet modern palette that allows for long-lasting, radiant works of art Original colors based on the palettes of the Impressionists; The most luminous lights to the richest darks Single Tube Only