Derwent - Watercolour Pencil - Imperial Purple - Derwent Watercolour Pencils are pencils that you can paint with. These Water Color Pencils are easier and more convenient to use than watercolour paints alone. Derwent Watercolour Pencils are a high quality colour pencil that you can paint with as well, so you can enjoy the best of both worlds. Derwent Watercolour can be used wet or dry, on wet or dry paper, to achieve a variety of effects, from bold, vibrant images to delicate watercolour washes. It comes in 72 great colours, which retain their full intensity however you use them. For sheer versatility, Derwent Watercolour is unmatched.