Hey vladasyn,
Yes, both the horizontal and vertical scroll bar backgrounds & the 'thumbs' can be changed to color of preference. It's not just a windows thing. These locations are actually pretty easy to change. They are found in Theme Editor under the following 'tree' locations: Global/Scroll bars/Scroll Bar Background and Scroll Bar thumb. To change color for the selected track (at least the track header) in Track View go to Track view/Focused Strip Background. Go to Console view/Focused Strip Background to change the whole channel strip color. In each case, right click on the item you want to change (or select the edit tool at top of window), select edit from the popup menu and choose color of preference from the standard color palette. Don't forget to save these new color changes by saving this custom theme with a new name.
My apologies to outland144k for this brief thread hijack.
Best, HeyDan