Cellular Noise with Gradient Map

class Example extends Phaser.Scene
{
    red = new Phaser.Display.Color(255, 0, 0);
    blue = new Phaser.Display.Color(0, 0, 255);
    color1 = new Phaser.Display.Color();
    color2 = new Phaser.Display.Color();
    color3 = new Phaser.Display.Color();
    color4 = new Phaser.Display.Color();
    color5 = new Phaser.Display.Color();

    create()
    {
        const { width, height } = this.scale;

        const noise = this.add.noisecell3d({
            noiseCells: [ 16, 9, 4 ],
            noiseMode: 1 // Render cells as random flat values.
        }, width / 2, height / 2, width, height);

        // Use a black-and-white input to drive a complex color output.
        Phaser.Display.Color.IntegerToColor(0x446688, this.color1);
        Phaser.Display.Color.IntegerToColor(0x000044, this.color2);
        Phaser.Display.Color.IntegerToColor(0x662288, this.color3);
        Phaser.Display.Color.IntegerToColor(0x66aa66, this.color4);
        Phaser.Display.Color.IntegerToColor(0xff8866, this.color5);
        noise.enableFilters().filters.internal.addGradientMap({
            ramp: [
                {
                    colorStart: this.color1,
                    colorEnd: this.color2,
                    colorSpace: 1,
                    size: 0.3
                },
                {
                    colorStart: this.color2,
                    colorEnd: this.color3,
                    colorSpace: 1,
                    size: 0.2,
                },
                {
                    colorStart: this.color3,
                    colorEnd: this.color4,
                    colorSpace: 1,
                    size: 0.2,
                },
                {
                    colorStart: this.color4,
                    colorEnd: this.color5,
                    colorSpace: 1,
                    size: 0.3,
                }
            ]
        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.WEBGL,
    parent: 'game-container',
    width: 1280,
    height: 720,
    scene: Example
};

const game = new Phaser.Game(config);