Wild Apricot Login Button reformat

I’me using the Wild Apricot Login button on my WordPress site. I’ve added the log in button but need to change the color of the text on the button and the color of the member name once logged in to my WordPress site. When I go to customize the widget in the Ocean WP customizer I get the following message: “Your theme has 6 widget areas, but this particular page doesn’t display them. You can navigate to other pages on your site while using the Customizer to view and edit the widgets displayed on those pages.”

When navigating to any other page I get the same message.

How can reformat the color of the text in the Wild Apricot login button?

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