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This only appears on admin pages, so no link is useful.
I am not sure precisely when, but Charitable added a new css file: charitable-admin-2.0.css
It contains a block:
#wpbody-content.page-title-action {
background-color: #5aa152;
border-color: #5aa152;
etc… }
which unconditionally overwrites the css of my theme. Perhaps you have omitted some context-based restrictions.