This happy gorilla looks like he's ready to play some music! His blue shirt matches the pick on his guitar and the microphone in his hand. His gaze is fixed on the music stand, which holds the music he'll be singing or playing. I would approach coloring this page by first giving prominent attention to the blue shirt with bright and vibrant blues, then perhaps complements of yellows, oranges and reds for the guitar and microphone. For the gorilla itself, I'd use browns and beiges, mixed with yellow and green hues to provide contrast and some dimension to the face. Finally, the music stand would look great with a warm shade of brown, and perhaps some gold highlights to bring it to life.