antd-theme-generator/node_modules/less/test/css/namespacing/namespacing-3.css

This a script to generate color specific styles less file and which you can use to change theme dynamically in browser

@media (min-width: 320px) {
  .toolbar {
    width: 400px;
    height: 200px;
    background: red;
    color: white;
  }
}