I managed to get a screenshot of a yellow Alt-tab switcher; I've also seen the Launcher go this colour (but not the whole rest of the screen as in the images above).
** Attachment added: "unity-alt-tab-yellow-background.png" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/828363/+attachment/2319487/+files/unity-alt-tab-yellow-background.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/828363 Title: Dash picks random weird colors (yellow, green), fonts invisible (with blur en- or disabled) To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/828363/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs