Adjust colors on verification page

How can I adjust the foreground and background color of the verification box (default: blue background and white text/loader) animation?

With Pro you can edit them by yourself:

I did that, but the box that is loaded from the remote challenge.js is always with blue background and white foreground, or did I miss something?

Maybe you need to override the CSS. You can use !important on your color definition

For example:

1body {
2   background: #fff !important;
3}

Thanks! To switch to black / white I used the following, and it worked:

          background-color: #fff !important;
      }
      #sl-loader {
          --uib-color: #000 !important;
      }
      #sl-text {
          color: #000 !important;
      }```