Image glow in Foundation theme

Hello All,
I have made quite a few changes to the Foundation theme using the CSS editor and have two more last changes to figure out.

One of them is the image glow or hover highlight that is on images when show a list of items or item sets.

It is a very faint bit of aqua from the Seafoam theme. How can I change that color?

The other issue is the vertical nav that appears on pages with children. See below:

I have tried doing this:
.menu.vertical, .toc-block>ul, .toc-block ul ul {

But it breaks other parts of the site, like child pages on the top bar navigation and also showing child pages when using the table of contents block.

Thanks for your help!