Claws mail with dark theme

Hi everyone. I don’t know if this is the right place, but I installed claws-mail on ubuntu and selected the dark theme on GNOME.

The theme is fine for the most part, but the most annoying thing is the colors of the unread email. It is unappealing and illegible.

Is there any way to fix this? Should I file a bug somewhere?

I spoke to people on IRC and they assure me the problem has nothing to do with claws-mail.