I was very unhappy with the default look and feel of my Rich Client Platform based on Eclipse 4.4 so i decided to work on a new custom CSS with gradients for Bio7. The nearly finished CSS (tested on Windows) is displayed below which corrects not only colours but also the different toolbar settings (background of the main toolbar and height of the view toolbars) to display e.g. the floating toolbar actions correctly without hiding other window elements.
There are still some minor bugs to correct. E.g. the Maximize, Minimize icons have to be resized to display the toolbar colour correctly.
In addition i was able to correct the alignment of the different Bio7 editor actions and i could even improve the integration of the JDT actions and hide unnecessary GUI elements for Bio7 (menu and toolbar – see screenshot below).