Blue comes to mind

 when I hear mellow jazz.  Percussions included.  

Her favorite colors, you ask?

Blue, yellow, red.  Colorful.  Bold, of course.  

Celestial rocks

 What better way to honor a friend, especially if she had a love of blue. Of yellow.  Of red.  

Sometimes the simple is a marvel

This shade of blue makes everything special. Do you think the sky is jealous?