You can use below shortcodes to create content box / text box of different styles.
Demo Link:
https://demo2.drupar.com/vanipro/elements/icon-box-and-text-box
Default Text Box
Use below shortcode to create content box of default style. Background color of default style is content background which can be set from theme settings.
<div class="box">
your content here..
</div>Dark Text Box
Use below shortcode to create dark content box.
<div class="box-dark">
your content here..
</div>Theme Text Box
Use below shortcode to create content box with theme background color. Theme color can be set from theme settings.
<div class="box-theme">
your content here..
</div>