Replace specific object colors in Display Mode settings

I would like to set a dark background for my 2D views, but the problem is that the default black lines/text/annotations become hardly visible. At the moment, you only have the option to use object specific color or single color for objects.

Would it be possible only to invert blacks to whites (or a more universal option to replace certain colors) and leave the rest with their object specific color?

Is it also possible to enable the corsshair for a specific display mode?

Hello - currently neither of those is possible in Rhino that I know of.

-Pascal