Custom colorRange with specify value (layer hexbin)

[SincerelyUnique]

        {
          id: '7otjdz',
          type: 'hexagon',
          config: {
            dataId: 'bart-stops-geo',
            label: 'Hexagon',
            color: [123, 184, 190],
            columns: {
              lat: "latitude",
              lng: "longitude"
            },
            isVisible: true,
            visConfig: {
              opacity: 0.8,
              worldUnitSize: 300,
              resolution: 8,
              colorRange: {
                name: 'ColorBrewer GnBu-6',
                type: 'sequential',
                category: 'ColorBrewer',
                colors: ['#32CD32', '#EEC900', '#ff0000'],
                //colors: ['#43a2ca'],
                reversed: false
              },
              coverage: 1,
              sizeRange: [0, 500],
              percentile: [0, 100],
              elevationPercentile: [0, 100],
              elevationScale: 5,
              'hi-precision': false,
              // enableElevationZoomFactor: true,
              colorAggregation: 'average',
              sizeAggregation: 'count',
              enable3d: false
            },
          },
          visualChannels: {
            colorField: {
              "name": "Median RTT",
              "type": "integer"
            },
            colorScale: 'quantile',
            sizeField: null,
            sizeScale: 'linear'
          }
        },
        

Hi Team

Sorry to bother you, I have 3 types of data and want to display with the specify colors: green, yellow, red
we want to set:
the value < 20 to green
the value 20<= and < 100 to yellow
the value >= 100 to red

do we supoort specify the color with the fixed value range?