js-color-gradient/example/react-example/src/config.js

This project hepls to get color gradient code based on value.

export const customColorMatrixOptionsAllGradient = [
    {
        style: 'gradient',
        range: '0-20',
        fromColor: '#8B0000',
        toColor: '#FFCCCB'
    },
    {
        color: '#FFFF00',
        style: 'gradient',
        range: '21-40',
        fromColor: '#8B8000',
        toColor: '#FFFFE0'
    },
    {
        style: 'gradient',
        range: '41-100',
        fromColor: '#0000ff',
        toColor: '#ADD8E6'
    }
];

export const customColorMatrixOptionsOneConstant = [
    {
        style: 'gradient',
        range: '0-20',
        fromColor: '#8B0000',
        toColor: '#FFCCCB'
    },
    {
        style: 'constant',
        range: '21-40',
        color: '#FFFF00'
    },
    {
        style: 'gradient',
        range: '41-100',
        fromColor: '#0000ff',
        toColor: '#ADD8E6'
    }
];