E.D., you may change the colour of the text labels by adding the following CSS code via the Admin Area>Appearance>Edit Theme>CSS tab.
Paste the following code:

.profile-BASE_CMP_UserViewWidget .user_profile_data table tr td.ow_label {color:red;}

In case you need to change just the Real name label, this is rather considered as a custom code modification rather than the CSS modification. You will need add the "if" condition to the core code file.  And  if you are not familiar with the code modification, it would be better for you to find a developer who can help you. You can do it here: http://www.oxwall.org/market/specialists

Or you may use this CSS code to mark only the third label, for example:

.profile-BASE_CMP_UserViewWidget .user_profile_data table tr:nth-child(3) td.ow_label {color:red;}

But this option may not work properly in all browsers and I would not recommended it.

In all cases  you should remember that your custom CSS  or custom code modification may stop working after update and you will need to edit it.