How can I change the color of the "To Top" Button

Thank you for this nice Theme. I’m a total beginner with WP and webdesign so I fight now for month. Step by step I get the page running

One question. How can I change the color of “To Top” button on the lower right corner of a page. Users cant realy find this button when the page color is white and also the button is white. See

Thanks a lot

Add this to Theme Options - Other - Custom CSS or inside Child Theme style.css if you use one.

.back-to-top a {
	background: #111;

This will change color to black but you can feel free to adjust color code to get the results you were looking for.