Hi A,

You can customize first by adding class to it as you can see in image below.

(view large version)

CSS Class : 

job-menu-item

Consider reading the article we wrote about How to Add Custom CSS.

In Custom CSS Section you can Customize as you wanted.

Example:

.job-menu-item { background-color: #e2e2e2 }
.job-menu-item a { color: #52C27D}

Thank you.