Steps to reproduce

• Create unreadable data; exempli gratia, by installing the Docker Build Step plugin, configuring a Freestyle job with it, and uninstalling the plugin.
• Enable the dark theme.
• Go to Manage Jenkins.

Expected results

The Dismiss button should be readable, as it is in the "old" screenshot where there is black text on a light blue background.

Actual results

The Dismiss button is unreadable, as it is bright red text on an orange background, which cannot be distinguished, as shown in the "new" screenshot.