Too light colours / too low contrast

[mistofeles]

Nemo is rather good file manager. Except that the coulours are too light.
It would be bice to see, which panel is active.
The contrast of the colours is too low, the border line between the panels is invisible.

Please add a tab to prferences to select the colours.
I have gone through all possible combinations in Themes with no use.

btw. Please add the arrowheads to the lifts to scroll up and down. They are important, when you scroll a long list. The lifts are too rough for this kind of work.

I do not want to edit the config files, because I have many customers with the same problem.

Good looks is nice but usability is still the most important aspect.