shadow around content areas, but not over color sections

I decided to put a box shadow around the main content area. The effect can be seen on http://www.thejetcoaster.com/blog

However, if I make a page with separate color sections, the color section has its own box shadow. Is it possible to prevent the color section from having its own box shadow? The code I am using is:

/* box shadow around content areas　 */
.container {
  box-shadow: 0 20px 150px -40px #000;
}