问如何在Angular Dart项目中将angular_components的材质图标颜色改为白色？

EN

<material-drawer persistent #drawer="drawer"
                 [class.custom-width]="customWidth">
    <div class="mini-drawer">
        <material-list *deferredContent>
            <div class="mat-drawer-spacer"></div>
            <div>
                <material-list-item>
                    <material-icon icon="inbox"></material-icon>
                </material-list-item>
                <material-list-item>
                    <material-icon icon="star"></material-icon>
                </material-list-item>
                <material-list-item>
                    <material-icon icon="send"></material-icon>
                </material-list-item>
                <material-list-item>
                    <material-icon icon="drafts"></material-icon>
                </material-list-item>
            </div>
        </material-list>
    </div>
</material-drawer>
<div class="material-content">
    <header class="material-header shadow">
        <div class="material-header-row">
            <material-button class="material-drawer-button" icon (trigger)="drawer.toggle()">
                <material-icon icon="menu"></material-icon>
            </material-button>
            <span class="material-header-title">Mobile Layout</span>
            <div class="material-spacer"></div>
        </div>
    </header>
    <div class="app-layout">
        Lorem ipsum dolor sit amet, ad erat postea ullamcorper nec, veri veniam quo
        et. Diam phaedrum ei mea, quaeque voluptaria efficiantur duo no. Eu adhuc
        veritus civibus nec, sumo invidunt mel id, in vim dictas detraxit. Per an
        legere iriure blandit. Veri iisque accusamus an pri.

    </div>
</div>

@import 'package:angular_components/css/material/material';
@import 'package:angular_components/material_tab/mixins';
@import 'package:angular_components/app_layout/mixins';

:host {

}

.custom-width {
  @include mat-drawer-width(72px);
  @include mat-temporary-drawer-width(72px);
}

.mini-drawer {
  height: 100%;
  background: $mat-blue;
}

material-list {
  background-color: transparent;
  color: $mat-white;
}