import { LegendThreshold } from '@visx/legend';
import { scaleThreshold } from '@visx/scale';

const threshold = scaleThreshold({
  domain: [0.02, 0.04, 0.06, 0.08, 0.1],
  range: ['#f2f0f7', '#dadaeb', '#bcbddc', '#9e9ac8', '#756bb1', '#54278f'],
});

function MyChart() {
  return (
    <div>
      <svg></svg>
      <LegendThreshold
        scale={threshold}
        direction="column-reverse"
        itemDirection="row-reverse"
        labelMargin="0 20px 0 0"
        shapeMargin="1px 0 0"
      />
    </div>
  );
}

npm install --save @visx/legend