Going to report this upstream. I fixed it by simply adding a foreground colour in /usr/share/meld/styles/meld-dark.xml:
<style name="meld:unknown-text" background="#aaaaaa" foreground="#888888"/> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1580366 Title: Couldn't find colour scheme details for meld:unknown-text-foreground To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/meld/+bug/1580366/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs