When I change IntelliJ's theme from the white default to dark ("Darcula"), everything goes fine — except for error messages printed in the REPL (which are almost invisible, due to the black font color). I have to restart IntelliJ to restore the color of the error messages in the REPL.
This may seem like a trivial annoyance, but it means that I have to restart IntelliJ at least twice each day (I like the dark colors early in the morning and late in the evening, but not throughout the day).
Example of how everything should look:

Example of the wrong color of the error messages:
