ant-design/components/time-picker/demo/colored-popup.md

order	title	debug
9	[{zh-CN 色付きポップアップ} {en-US Colored Popup}]	true

zh-CN

カスタムクラスを TimePickerポップアップに渡す

en-US

Passing custom class to TimePicker popup

import { TimePicker } from 'antd';
import dayjs from 'dayjs';
import customParseFormat from 'dayjs/plugin/customParseFormat';

dayjs.extend(customParseFormat);

const onChange = (time, timeString) => {
  console.log(time, timeString);
};

export default () => (
  <TimePicker
    onChange={onChange}
    defaultOpenValue={dayjs('00:00:00', 'HH:mm:ss')}
    popupClassName="myCustomClassName"
  />
);

.myCustomClassName .ant-picker-time-panel-cell-inner {
  color: red !important;
}