ant-design/components/config-provider/demo/theme.tsx

import React from 'react';
import {
  Button,
  ColorPicker,
  ConfigProvider,
  Divider,
  Form,
  Input,
  InputNumber,
  Space,
  Switch,
} from 'antd';
import type { ColorPickerProps, GetProp } from 'antd';

type Color = Exclude<GetProp<ColorPickerProps, 'value'>, string>;

type ThemeData = {
  borderRadius: number;
  colorPrimary: string;
  Button?: {
    colorPrimary: string;
    algorithm?: boolean;
  };
};

const defaultData: ThemeData = {
  borderRadius: 6,
  colorPrimary: '#1677ff',
  Button: {
    colorPrimary: '#00B96B',
  },
};

export default () => {
  const [form] = Form.useForm();

  const [data, setData] = React.useState<ThemeData>(defaultData);

  return (
    <div>
      <ConfigProvider
        theme={{
          token: {
            colorPrimary: data.colorPrimary,
            borderRadius: data.borderRadius,
          },
          components: {
            Button: {
              colorPrimary: data.Button?.colorPrimary,
              algorithm: data.Button?.algorithm,
            },
          },
        }}
      >
        <Space>
          <Input />
          <Button type="primary">Button</Button>
        </Space>
      </ConfigProvider>
      <Divider />
      <Form
        form={form}
        onValuesChange={(_, allValues) => {
          setData({
            ...allValues,
          });
        }}
        name="theme"
        initialValues={defaultData}
        labelCol={{ span: 4 }}
        wrapperCol={{ span: 20 }}
      >
        <Form.Item
          name="colorPrimary"
          label="Primary Color"
          trigger="onChangeComplete"
          getValueFromEvent={(color: Color) => color.toHexString()}
        >
          <ColorPicker />
        </Form.Item>
        <Form.Item name="borderRadius" label="Border Radius">
          <InputNumber />
        </Form.Item>
        <Form.Item label="Button">
          <Form.Item name={['Button', 'algorithm']} valuePropName="checked" label="algorithm">
            <Switch />
          </Form.Item>
          <Form.Item
            name={['Button', 'colorPrimary']}
            label="Primary Color"
            trigger="onChangeComplete"
            getValueFromEvent={(color: Color) => color.toHexString()}
          >
            <ColorPicker />
          </Form.Item>
        </Form.Item>
        <Form.Item name="submit" wrapperCol={{ offset: 4, span: 20 }}>
          <Button type="primary">Submit</Button>
        </Form.Item>
      </Form>
    </div>
  );
};