Product Information Lightfast 4 (1-Excellent, 2-Very Good, 3-Good, 4-Fair, V-Poor) Blue Slate PC 1024 RGB: 145,224,255 CMYK: 43,12,0,0 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.