how to change the css of default select2 placeholder color?

Question

I am using select2 plugin. In the mandatory fields I have to give the select2 placeholder color as red.

How do I change the default select2 placeholder color to red?

HTML

<select id="leadadd_mode_of_enq" name="leadadd_mode_of_enq" class="select2 req_place" data-select-search="true" placeholder="Mode of enquiry">
    <option value="1">Opt1</option>
    <option value="2">Opt2</option>
</select>

CSS

.req_place::-webkit-select-placeholder{
    color:#FFF !important;
}

Answer 1

the answers given are old and you can now use the css class

.select2-selection__placeholder {
    color: #FF0000;
}