ant-design/components/slider/demo/multiple.tsx

import React from 'react';
import { Slider } from 'antd';

function getGradientColor(percentage: number) {
  const startColor = [135, 208, 104];
  const endColor = [255, 204, 199];

  const midColor = startColor.map((start, i) => {
    const end = endColor[i];
    const delta = end - start;
    return (start + delta * percentage).toFixed(0);
  });

  return `rgb(${midColor.join(',')})`;
}

const App: React.FC = () => {
  const [value, setValue] = React.useState([0, 10, 20]);

  const start = value[0] / 100;
  const end = value[value.length - 1] / 100;

  return (
    <Slider
      range
      defaultValue={value}
      onChange={setValue}
      styles={{
        track: {
          background: 'transparent',
        },
        tracks: {
          background: `linear-gradient(to right, ${getGradientColor(start)} 0%, ${getGradientColor(
            end,
          )} 100%)`,
        },
      }}
    />
  );
};

export default App;