Hi Don,
Can you try using the following custom css codes into your custom css file and see how it goes?

#es .es-dialog-modal {

  color: #fff;

}

still the same

Hey Don,
I have helped you add the custom css codes into the file: JoomlaFolder/templates/currentTemplate/html/com_easysocial/css/custom.css
It should be working fine now.
http://take.ms/M0k5Z
Double check for me and let us know how it goes.

Perfect! Thank you Raymond! Did I not place the code right in the custom CDs?

Hey Don,
You're welcome. Where did you place the custom css? When I checked, the file I mentioned did not exist so I created it and placed the css codes in there.