Video player controls - Adjust the colors

Running NC 16.0.6 on Ubuntu/Apache/MySQL/PHP7.3.

When sharing videos, there are issues with seeing the controls on the playback bar if they are on a white background. They are there, but they are white controls on a white background.

Here is a sample:

Is there a way to change the CSS or something to change those playback controls to, say, a light gray or something other than white?

Any guidance is greatly appreciated!