Twenty Thirteen: lighten orange color for link text in footer widgets, props sabreuse. See #23513.

Also use same shade for paging links, to be consistent and not have thousands of small color variations in the the theme.

git-svn-id: http://core.svn.wordpress.org/trunk@23650 1a063a9b-81f0-0310-95a4-ce76da25c4cd