Jimmy Buffett

Laid-back superstar

- STEPHANIE ZACHAREK

IF YOU HAD TO ASSIGN A COLOR to Jimmy Buffett's perennially laid-back sound, it would be a vivid Caribbean blue, the hue of a tropical sky and sea merged into one breezy swirl. Buffett, who died on Sept. 1 at age 76, wasn't just a singer-songwriter; he was a vibe, one that millions of fa