Pyrrole Crimson, 326 (Liquitex Heavy Body)Pyrrole Crimson, 326 (59ml Tube) A rich blue red, highly opaque single pigment color. Pyrrole was first discovered in 1834 and its name comes from the Greek for reddish or fiery. This is thick, high viscosity, pigment rich professional acrylic color, ideal for impasto and texture. With a high concentration of lightfast artist quality pigment and a satin finish, Heavy Body Acrylic gives you rich, permanent color, with crisp brush strokes and knife