for scrollbars i have added support for lowlighting inactive scrollbar sliders ie. the lowlight colours will show unless you click on the slider and drag it
With all due respect, testing this out, I don't see a big use for this in the current state.
The lowlight color determines the visibility of the scrollbar and where you can 'grab' it.
Only after you 'managed' that, the color changes to highlight. I honestly don't see a big advantage in that.
An idea coming up, is that this could be a lot more useful if the state would go from lowlight to highlight, as soon as your mouse enters the corresponding pane.
Then by default the scrollbars could be unobtrusive lowlight (or theoretically even invisible), and become clearly visible and grabbable at hover-over.