Status-LED leuchtet blau, warum ?

function shellyPlugSChangeLEDColor(red, green, blue, brightness) {
    let config = {
    "config": {
    "leds": {
    "colors": {
    "switch:0": {
    "on": {
    "rgb": [red, green, blue],
    "brightness": brightness
    }}}}}};
    Shelly.call("PLUGS_UI.SetConfig", config);
}

Timer.set(5555, true, function() {
    let red = Math.round(Math.random() * 100);
    let green = Math.round(Math.random() * 100);
    let blue = Math.round(Math.random() * 100);
    let brightness = Math.round(Math.random() * 100);
    shellyPlugSChangeLEDColor(red, green, blue, brightness);
});