Hello, @Oliver Theiß,
1. Thanks for the screenshot, I have understood your issue.
Now, In order to solve your issue simply go to the Dashboard >> XStore >> Theme Options >> Theme Custom CSS >> Global and then paste the below code at the bottom of the CSS box there.
.et-quick-view-wrapper .et_attribute-name:after{color:#EE1250 !important;}
.et-quick-view-wrapper .product p.wc-gzd-additional-info a{color:#EE1250 !important;}
Then save settings and check back to your site after clearing the browser cache.
2. I will get back to you on this after confirmation from our dev team. Please be patience and stay tuned.
Regards 8Themes Team.