Hello, @Oliver Theiß,
1..I have set the color on the product titles as per you requested please check the image: https://postimg.cc/rz0GThGx and here is the result: https://postimg.cc/MXQBNnxY However in the first point you shared two pictures and I don’t find this page on your site: https://postimg.cc/5Yc4CNGx can you please share the URL of this page with us please.
2.. Alright I have added a custom CSS code to make it work as per your instructions. Check this image for the custom CSS code I added in the theme options: https://postimg.cc/nXYCZmwv and now check the resulting image here: https://postimg.cc/4nQfYG1g Please check back to your site after clearing the browser cache.
Regards 8Themes Team.