Change filter colour

I have the filter gallery plugin, but the filter buttons seem to be blue.

I’ve done an inspect on the buttons and found that its the following code that does it

.ufg-parent-filter-button {
color: #FFFFFF !important;
background-color: #007BFF !important;
border-color: #007BFF !important;

Problem is that the source file where this is sat is showing the actual page… which there is no way i can get to it to edit it.

How do you override it with the additional css? I’ve tried just putting in that code and changing the hex code but that doesnt seem to work.

Is there any way of getting to the file for the page to change it?