Issue with setting color for “more…” with WP Fullcalendar integration

Crossposted from WP FullCalendar:

I used the jQuery options in WP FullCalendar to change the color scheme from the default color to the flick option, and I changed the event category colors in Events Manager, but where “more…” appears, it’s still holding on to the gold background color and border color from the previous jQuery color setting.

I can set colors for event categories in Events Manager, but there is no option for “more…”

I figured out that the class name fc-event is controlling this, but I can’t figure out the right CSS code to change it to a white background and blue border. This is one of the many I have tried:

span.fc-event
{
background-color: #ffffff !important;
border-color: #00469e !important;
}

I even tried including all of the class names:

span .fc-day-grid-event .fc-h-event .fc-event .fc-start .fc-end .wpfc-more
{
background-color: #FFFFFF !important;
border-color: #00469e !important;
}

I tried these and more with and without the use of span. Any ideas?

View screenshot at https://drive.google.com/file/d/1vv4siqwHgTOxquAO9ApRkh8YeAaNm-aH/view?usp=sharing

The page I need help with: [log in to see the link]