Remove Featured Content Grid Hover Underline + Add text background?

Hi, I'm looking for CSS that will remove the underline from the hover state of both large and small Featured Content Grid titles. I'm also wondering if anyone knows a good way to put a transparent background behind the Large titles of the Featured Content Grid. Right now I've put in : background-color: rgba(225, 51, 138, 0.75);` for .entry-title, but the transparent background extends beyond the end of my titles. Site: http://philadelphiacontemporary.org/ Thank you for any help you can offer!