Trying to run Numerorata in 16bit-colours results in following error (and the game freezes):

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Invalid display mode
at sun.awt.Win32GraphicsDevice.setDisplayMode(Unknown Source)
at sun.awt.Win32GraphicsDevice$Win32FSWindowAdapter.windowIconified(Unknown Source)
at java.awt.AWTEventMulticaster.windowIconified(Unknown Source)
at java.awt.Window.processWindowEvent(Unknown Source)
at javax.swing.JFrame.processWindowEvent(Unknown Source)
at java.awt.Window.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)