AnthoLume/assets/reader/themes.css

.light {
  background-color: #fff;
  color: #000;
}

.tan {
  background: #d2b48c;
  color: #333;
}

.blue {
  background: #1f2937;
  color: #fff;
}

.gray {
  background: #232323;
  color: #fff;
}

.black {
  background: #000;
  color: #ccc;
}