I chose CATEGORY TOP POSTS GRID STYLE 4, but it looks somehow “brownish” on my site. Some with the blocks.
Is there any way to change this basis color?

OK, it´s http://www.hasepost.de (though I´m still working on the page I´ll keep it open for the next 60mins (till 5:45PM), if possible check now – will be in maintenance mode again later this day.
Hi
I’ve checked the image displayed on the grid and noticed that the thumbnails for it are not generated properly. Try to regenerate all your thumbnails following this guide: https://forum.tagdiv.com/thumbnails-fix-strange-looking-images-on-blocks/ clear all caches then test again.
Let me know how it goes.
Thanks!
No success 🙁
I ve checked the fixed sizes for the thumbnails, please find screenshot attached.
Are these the correct sizes?

Hi
These are default settings from WordPress but our theme create its own thumbs for each module. Theme’s thumbs can be enabled/disabled from theme panel > block settings: http://screencast.com/t/4r5CKoaUhF
Make sure you regenerate your thumbnails following our guide then test again.
Thanks!
Followed your instructions – but I think with no effect.
Even new articles with new pictures are looking kind of dark.
Can you take a look?
Hi
I’ve checked your site again and now the thumbs are generated properly: http://screencast.com/t/aXUv3ePEAa The theme add a dark animation over each thumb displayed in big grid but you can use this css in theme panel > custom code > custom css to remove it: http://screencast.com/t/oer4LHMWdN
.td-module-thumb a:last-child:before{
background: none!important;
}
Let me know how it goes.
Thanks!