This accordion is a wonderfully vibrant instrument! Each side of the instrument is divided between two sections, the front with its keyboard and the back with the bellows. The keyboard is composed of various buttons, each of which plays a different note when pressed. The bellows on the back is responsible for pumping air into the air chamber, which helps to make the music. The strap, which is connected to both the front and the back, steadies the instrument and helps you to keep a hold of it.
When coloring this page, I would suggest thinking of the different components of the accordion. For the body of the instrument, you might use a warm grey or beige, while the buttons and the strap might be a fun, contrasting, brighter color. You can also experiment with the air chamber, by making it one solid color or by adding different hues within it. Finally, to give the page some depth and life, you could add some splashes of color, particularly around the edges and near the strap. All in all, no matter how you choose to color it, this accordion coloring page is sure to be a lively and whimsical sight!