How to change color of the <DropdownList> (from react-widgets) placeholder text?

Question

                <DropdownList
                  data={baseYearDropdownOptions}
                  containerClassName={classNames(styles.dropDownList,           
                     'custom-react-dropdown')} 
                />

            

                .dropDownList
                 {
                   color: black;
                  }

Color of the text in dropdown placeholder is not changing ..