Default configuaration of breeze colors renders in unreadable tooltips in non-native (gtk) applications, which is a major drawback. See https://bbs.archlinux.org/viewtopic.php?id=197071 (screenshot of inkscape). Not everybody has time to google for workarounds (like disabling "Apply colors to non-QT-applications"), so you should change configuration appropriately.
*** This bug has been marked as a duplicate of bug 355540 ***