I realize this thread is old but this is still relevant in RS2
If you have a textcolor at Lists,Menus &Tabs>Listview>Listitem>Selected
Remove it
Then the select text color in regedit(and many other programs,like Winrar and 7zip)
will be themeable from Fonts & System Metrics>highlighttext
Did not work here. Do you have a RS2 Theme without that issue?
I think the regedit black font color if selected must be a default color of Windows: Just to find that out my theme is completely without black (no #000000 to be found in color search).
So always if I find a 000 picking colors of a screenshot I know that this black is not coming out of my (findable) theme colors.
I wish somebody or Mr. Grim could find something to change it in shellstyle.dll?
Just checked in his RS2 Black Edition - still no solution, too sad