如何更改下图中 "expand-more" 图标的颜色(Materialize 框架)?

How can i change the color of "expand-more" icon on image below (Materialize framework)?

我无法使用 class .material-icons 更改图像上突出显示的图标 默认是黑色,我想改成白色 这段代码:

            <div class="row">
              <div class="col s12 m5">
                <div class="row card-panel teal">
                    <div class="row">
                        <form class="col s12">
                            <div class="input-field col s12">
                                <select>
                                    <option>Manhã</option>
                                    <option>Noite</option>
                                    <option>Indiferente</option>
                                </select>
                                <label>Disponibilidade</label>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </div>

The icon that I want to change is the red color circle highlighted

提前致谢!!

您在使用 Materialize's Select component 吗?

如果是这样,试试这个:

.select-wrapper span.caret {
    color: #FFFFFF !important;
}