I don't know how to get the primary theme color (Angular Material) in a e.g. component.ts. 
I can use color="primary in my template.html or mat-color($primary) in a style.scss. But how do I use theme colors for styling an element inside a canvas? How do I use them inside my TypeScript-code? 
Info:
"@angular/material": "^5.0.0-rc.2",
"@angular/core": "^5.0.0"
                I used a hacky solution. It's not beautiful but working.
component.html
<div #primary class="mat-button mat-primary" style="display:none"></div>
component.ts
declare let getComputedStyle: any;
export class Component implements AfterViewInit {
    @ViewChild('primary') primary: ElementRef;
    ngAfterViewInit() {
       const primaryColor = getComputedStyle(this.primary.nativeElement).color;
    }
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