Product Information Lightfast 2 (1-Excellent, 2-Very Good, 3-Good, 4-Fair, V-Poor) Slate Grey PC 936 RGB: 55,135,154 CMYK: 77,43,35,7 Artists' quality colored pencils for every level of expertise. High quality pigments for a rich color saturation. Soft, thick cores create a smooth color laydown for superior blending and shading. Thick leads resist breakage.