twitter/bootstrap — pull request #6646 by GeoffYoung (2013-01-20 19:14:31+00:00)
Title: Match color of button text and caret

This sets color for .btn and border-color for .caret in a variable.

If they're not moved to a variable they should at least be the same color by changing dropdowns.less
As it stands .dropup .caret is black while everything else is white.