Ruby Charm Colors Big Book of Color Charts – a colored pencil swatch book for adult coloring book enthusiasts and artists with over 40 pre-labeled coloured pencil (including Holbein, Faber-Castell, Caran d’Ache, Lyra, Schipierr Farben, Koh-I-Noor, Bruynzeel and more), pastel, ink, watercolor pencil and marker charts (c) 2020 S. Carlson / RubyCharmColors