Is it possible to set chart colors? about gantt HOT 4 CLOSED

draw_bar() {
    this.$bar = createSVG('rect', {
         x: this.x,
         y: this.y,
         width: this.width,
         height: this.height,
         rx: this.corner_radius,
         ry: this.corner_radius,
         class: 'bar' + this.task.custom_class, //added ' + this.task.custom_class'
         append_to: this.bar_group
         });

    animateSVG(this.$bar, 'width', 0, this.width);

    if (this.invalid) {
        this.$bar.classList.add('bar-invalid');
        }
}