Wendy,
I feel that B&W is good choice for the picture. He ignores the color around him. He's shut off from everything, except perhaps temperature of the air on his skin.
He's so into the book and music! I wonder whether he pays sufficient attention to either. If any of the two suffer, likely it's the music. He shuts out the rest of the world, even the sound of the wind or leaves. He perhaps wouldn't notice that everyone else has gone home, or never arrived!
Asher