Change Detection visuell sehen, let it blink

private element = inject(ElementRef);

    private zone = inject(NgZone);

    blink(): void {
        // Dirty Hack used to visualize the change detector
        // let originalColor = this.element.nativeElement.firstChild.style.backgroundColor;
        this.element.nativeElement.firstChild.style.backgroundColor = 'crimson';
        //              ^----- DOM-Element

        this.zone.runOutsideAngular(() => {
            setTimeout(() => {
                this.element.nativeElement.firstChild.style.backgroundColor = 'white';
            }, 1000);
        });
    }