antd-theme-generator/node_modules/less/test/css/mixins-nested.css

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

.class .inner {
  height: 300;
}
.class .inner .innest {
  width: 30;
  border-width: 60;
}
.class2 .inner {
  height: 600;
}
.class2 .inner .innest {
  width: 60;
  border-width: 120;
}