It would probably be easiest to add a unique classname to that particular h2 tag and apply @Gandalf’s CSS code with that classname to target that h2 tag. For example
<h2 class="uniqueclassname">SAP S4 HANA Finance</h2>
h2.uniqueclassname { background-color: red; }
If you do not know how to do this using your Wordpress tools, we can move this post to the Wordpress category for you.