Generate dynamic css based on variables angular

I'm trying to generate a dynamic css using values from json, I tried with following code in main component but its not working

@Component({
      templateUrl: 'card.html',
      styles: [`
        .card {
          height: 70px;
          width: 100px;
          color: {{css.cardColor}};
        }
      `],
})

How to we reference property values inside the styles declaration?

Edit : can not use ngStyle as its going to be applied on almost all elements as its for whole application and not only for specific element.

Direct approach available in angular is using ngstyle as follows

<div [ngStyle]="{'color': style.colorVal ? style.colorVal : '#000', 'font-size' : style.fontSize ? style.fontSize : '16px' }"></div>

After going through different methods and approached to add dynamic css to all pages on angular app I ended up with following solutions.

Requirement : generate dynamic css based on values returned from and API to change design and styling.

Solution :

1. create a new component and create a service to load dynamic css variables from API.
2. Add style tag in template file and use variable values for properties.
3. Load this template on all pages or on main template.
4. On app build style will be moved to head tag.

Code sample

import { CssService} from './Css.service';

@Component({
  selector: 'DynamicCss',
  templateUrl: './DynamicCss.component.html',
  styleUrls: ['./DynamicCss.component.scss']
})
export class ServiceProviderComponent implements OnInit {
    cssVariables: any;
    constructor(private cssService:CssService){
        /* call the service/api to get the css variable values in cssVariables */

    }
}

Now apply css using jquery or javascript to append css with help of function like following

appendCss(customData)
{
     let text = '.custom-form-1 {
            background-image: url("`+customData.background_image+`");
         }';
     $(document).ready(function(){
         $("style").append(text);
      });
}

and call this function after loading custom data from service or other variable like I did it ngOnInit

ngOnInit(){
 this.appendCss(this.customizeFormData);
}

Its using jquery but can be done with javascript/typescript as well if you dont want to use jquery in your angular app

Other useful resource https://github.com/angular/angular/issues/9343#issuecomment-312035896