In addition to the normal notes of a chord, you can add notes called “color tones”. They are called that because they add color and interest to a song. Some of the color tones you can add are 6ths, 7ths, major 7ths, 9ths, flatted 9ths, flatted 10ths, 11ths, 13ths, and combinations of all of these. Watch this short video that explains color tones:

To learn about a course on Color Tones, click here.