kitsune9
Adventurer
Are you perhaps thinking of this book, kitsune9?
Nope. The evil wizard Kelek was the only character on the cover of the coloring book with his arms outstretched. The title was Advanced Dungeons and Dragons and the background was a simple orange. It was a giant poster size book and were sold at KMart (where my parents bought me mine). I was eight years old at the time, three years before I got into gaming or even knew what it was.