Change color of header in Angular MDB accordion

Question

I am using mdb accordion and I want to change the color of title but I don't know how. I need the different color (green) on the header - Podrocja dela and when I click also green color of header.

<mdb-accordion [flush]="true">
            <mdb-accordion-item>
            <ng-template mdbAccordionItemHeader>Podrocja dela</ng-template>
            <ng-template mdbAccordionItemBody>
                Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry
                richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor
                
            </ng-template>
            </mdb-accordion-item>
            <mdb-accordion-item>
            <ng-template mdbAccordionItemHeader>Delovni pripomočki</ng-template>
            <ng-template mdbAccordionItemBody>
                Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry
                richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor
               
            </ng-template>
            </mdb-accordion-item>
            <mdb-accordion-item>
            <ng-template mdbAccordionItemHeader>Izdelek in storitve</ng-template>
            <ng-template mdbAccordionItemBody>
                Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry
                richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor
                
            </ng-template>
            </mdb-accordion-item>
        </mdb-accordion>

Source: https://mdbootstrap.com/docs/b5/angular/components/accordion/ (under the section Flush)

Thank you for your help.