I was also just checking out the Medical Circle theme demo at: http://www.acmethemes.com/demo/?theme=medical-circle. In that demo the arrow is a white color with a blue background. When you hover over it, the background turns black like my site but little up arrow turns blue so you can still see the arrow in the black background. Now when you click the arrow and then scroll back down to look the color, the arrow itself is now blue with the clear background instead of back to the original white arrow with blue background. If you then click on a blank area on the site the color reverts back to the original. Is this supposed to be the behavior?