Customize User Interface Styles (Solarized?)

Is there a way to customize the UI style configuration? In the preferences, I can choose from a few styles (XP, caramel, Lilian, etc). Unfortunately, I miss a "Solarized" style. If this is not available, I would like to add my own.
I am currently working with SQL Navigator 7.6

Hi Markus,

I'm sorry we don't support a new/custom style in addition to the ones from the list.

Thanks,
Vincent