Google basically have been experimenting this month with new MANDATORY colors and formats that are overriding your regular palette. I have an open case with support and they have been talking to technicians about the issue.
Basically the system is ignoring my color choices and inserting these horrible black text ads that nobody in their right mind would click on. I have turned this off everywhere but they still persist. This is killing my CPC and my revenue is falling but they have not stopped with this.
The case is still open but be vigilant when you have text ads and even sometimes when you don't. The system is really acting very strange.