need give background color to My text area field in bootstrap this is text area field
<div class="form-group">
<div class="col-xs-12">
<textarea class="form-control" id="exampleTextarea" rows="6" placeholder="Message"></textarea>
</div>
</div>
You need to add one of this prepared classes https://getbootstrap.com/docs/4.1/utilities/colors/#background-color like .bg-warning or .bg-danger etc:
<textarea class="bg-warning"></textarea>
or in your case it will be like
<textarea class="form-control bg-warning"...