Continuous colour gradient around a radialBar

[OzGav]

Was looking at Apex Charts to be able to show severity based on the series value through use of colour. After much search I realised I could used a solid fill and specify colours based on value but this is not as visually appealing as a continuously changing gradient. Effectively I would like to be able to do a circular version of the image below. Any ideas?

edit: I have come up with this so that the fill changes but I would prefer to have the graph change colour in a rainbow fashion instead of being a solid colour according to the series value.

  fill: {
    type: 'solid',
    colors: [function({ value, seriesIndex, w }) {
      var green = Math.min(255,(Math.round(5.1 * value))).toString(16).padStart(2, '0').toUpperCase()
      var red = (Math.min(255,(Math.round(510 - 5.1 * value)))).toString(16).padStart(2, '0').toUpperCase()
      return '#' + red + green + '00';
    }]
  }
};