Howdy andyroach,
You could use the parent CSS rule “.tribe-events-adv-list-widget” to change styles for the entire list widget. For instance if you wanted to make them all white you could do:
.tribe-events-adv-list-widget{ color:#fff; }
If you need to be more specific, then whip out your browser inspector, inspect the exact element your want to style, and add it as a child to the .tribe-events-adv-list-widget rule just like your normally would in CSS.
I hope that all make sense. When it comes to customizing color and themes we of course can not give you exact code, but as outlined in our scope-of-support we gladly offer general advice like the above to get you started on the right track. Please let me know if you have questions about this. Cheers! I hope that goes smooth!
– Brook