Derwent Academy Watercolor Pencils offer the ideal introduction to the world of paint and wash. Use them as an ordinary color pencil or brush on a little water to create your own masterpiece. 3.3mm core. Available in 24 colors, they blend and dissolve easily to create a wide spectrum of watercolor shades. Colors include: Acid Yellow, Cadmium Yellow, Orange, Deep Red, Red, Rose, Bright Pink, Purple, Ultramarine, Light Blue, Blue, Sea Green, Dark Green, Light Green, Lime Green, Olive Green, Yellow Ochre, Terracotta, Brown, Burnt Umber, Black, Gray and White.