The Open Cave

Hi,
The other day, I started getting the forum in Red. All the usual blue style headers are now in red.
What have I done to change this? How do I change it back?
It looks horrible and I don't like it.

In the top banner, under the Search field, there’s an upward arrow next to the icons and the clock. If you click it you can choose from a few color schemes.

Thank you ... problem solved.
(how come I've never noticed that before?)