Hello, how do I change the element style?

I need to change the color of each element to this.

And change the lines that have been executed into this.

How do I do that?
Thank you

The modeling API allows you to change an elements color:

modeling.setColor(myElement, {
  fill: 'blue',
  stroke: 'red'

I can’t get modeling.

The plug-in I use is “bpmn-js/lib/NavigatedViewer.js”

My code

this.viewer = new Modeler({
    container: this.$refs.diagramCanvas
this.modeling= this.viewer.get('modeling');

The navigated viewer doesn’t have modeling since it doesn’t allow modeling. Use Modeler instead.