digiKam show thumbnails and previews in negative color

I am new to digiKam and I am using 8.0.4 in a Linux Docker container by linuxserver.io

All thumbnails and previews are shown in negative color. In the lighttable view the photos show in positive color.

Is it normal that the thumbs and previews show in negative?

I would highly prefer thumbs and previews to be also shown in positive color, but I couldn’t find any setting or information in the documentation that would allow me to do this.

Has anyone the same experience and found a way to do this?

Of course not! Should be someting with your setup (Docker?). Try an AppImage of digiKam and see if that behaves normal, that is with positive thumbnails.

Get it from here:

sounds like a config file issue. i’d try letting digikam rebuild the configuration file for it.
without digikam running, locate and rename the config file. then start digikam and and see if that clears the issue.