Again, select the path created in the previous step and make two copies in front (Control + C > Control + F > Control + F). Select the top copy and hit the down arrow twice. Reselect both copies and click on the Minus Front button from the Pathfinder panel.
You will get a group with five thin shapes. Remove the three, top shapes (pointed by the arrows), then turn the remaining shapes into a compound path. Fill it with R=140 G=135 B=120.