audiobookshelf/client/static/chromecast_receiver.css

.background {
  background: linear-gradient(to right bottom, #ff0000, #303030, #313131, #333333, #353535, #343434, #323232, #313131, #2c2c2c, #282828, #232323, #ff0000);
}

.logo {
  background-image: url(Logo.png);
}

.progressBar {
  background-color: rgb(238, 255, 65);
}

.watermark {
  background-image: url(icon64.png);
  background-size: 64px 64px;
}