Change Statusbar Icon/Text Color

Hi,

I want to change the icon color of the statusbar. I work with Unity 5.2 and set the statusbar setting to black transparent, which makes the statusbar transparent and white icons. I would like the statusbar to be transparent with black icons though - is this possible? Also I would need to switch this at runtime, sometimes transparent with white icons, sometimes transparent with black items...
Any help is much apprecciated!

Thanks in advance!
Mario