You can use following shortcode to create text of different colors.
White Text Color
<div class="white">
your content here..
</div>Black Text Color
<div class="black">
your content here..
</div>Theme Color Text
Theme color will change as per your settings.
<div class="theme-color">
your content here..
</div>Dark Text Color
<div class="dark">
your content here..
</div>