Circle Featured Image Color

I want to change the color of the featured image circles when you hover over them and also the read more buttons. How do I do that?

 

Nevermind I found it.

 

OK so I found how to change the featured circle image but not the Read more buttons. Help please?

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.readmore:hover{
background:red;
}
.readmore{
background:orange;
}