Due to spending 24/7 programming in front of a computer screen (job, thesis), it\'s beneficial to view dark colours as much as possible.
Ubuntu\'s Ambiance theme can
If you don't want to change the look of the entire desktop you can launch a separate GTK+ theme for Eclipse by setting GTK2_RC_FILES flag in the command to start Eclipse.
Example:
GTK2_RC_FILES=/path/to/gtk/theme/gtkrc /opt/eclipse/eclipse
That means that you can create a copy of your GTK+ theme and tweak it for Eclipse without effecting any other part of your desktop.