ant-design/site/theme/static/colors.less

.color-palette {
  margin: 45px 0;
}

.main-color {
  overflow: hidden;
  display: flex;
  &-item {
    flex: 1;
    height: 80px;
    border-radius: 4px;
    float: left;
    margin-right: 4px;
    transition: all .2s;
    position: relative;
    text-align: center;
    padding-top: 28px;
    font-family: Consolas;
    font-size: 12px;
    &:last-child {
      margin-right: 0;
    }
  }
  &-item &-value {
    font-size: 12px;
    position: absolute;
    bottom: -4px;
    transform: scale(0.85);
    left: 0;
    width: 100%;
    text-align: center;
    opacity: 0;
    transition: all .2s ease .1s;
  }
}

.color-title {
  margin: 0 0 16px 0;
  font-weight: 500;
  color: #5C6B77;
  font-size: 22px;
  text-transform: capitalize;
}

.color-description {
  font-size: 16px;
  margin-left: 12px;
  font-weight: normal;
  color: #888;
}

.main-color:hover {
  .main-color-item {
    padding-top: 4px;
  }
  .main-color-value {
    opacity: 0.7;
    bottom: 3px;
  }
}

.color-block {
  position: relative;
  width: 60px;
  border-radius: @border-radius-base;
  height: 28px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
  cursor: pointer;
}
.color-block:after {
  position: absolute;
  top: 10px;
  left: 0;
  height: 100%;
  width: 100%;
  content: "Copied!";
  font-size: 12px;
  line-height: 28px;
  text-align: center;
  color: #444;
  transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
  opacity: 0;
}
.color-block.copied:after {
  opacity: 1;
  top: 0;
}
.color-block.dark:after {
  color: #fff;
}

.make-palatte(@color, @index: 1) when (@index <= 10) {
  .palatte-@{color}-@{index} {
    @background: "@{color}-@{index}";
    background: @@background;
  }
  .make-palatte(@color, (@index + 1));    // next iteration
}

.main-color {
  .make-palatte(blue);
  .make-palatte(purple);
  .make-palatte(cyan);
  .make-palatte(green);
  .make-palatte(pink);
  .make-palatte(red);
  .make-palatte(orange);
  .make-palatte(yellow);
}