twbs/bootstrap — pull request #14393 by ShaunR (2014-08-14 16:15:38+00:00)
Title: Lets set a color on panels since a background is already being set

It almost looks like this is the way this mixin was intended to be. We are setting variables for the panels color in ```less/variables.less``` however were not using them other than to set the headings color. Since panels set a background color we should probably set a foreground color.

This also would fix this issue... http://jsfiddle.net/rwnnwy1b/2/