Thanks for comment. Of course it can be changed, every color and image without any kind of exception can be changed... at least by using other 3rd party tools like Windows Style Builder (the version for Windows 10 in this case), I used that software for many years to personalize themes, and I know with that tool I can change the colour that I mentioned, the good thing about that tool is that it represents each one of the default Microsoft controls and dialogs in a treeview with all their painting and behavior properties for each one separatedly (even you can add custom props), and it works to generate standard Windows theme files (eg. like "aero.theme" file), but it is very tedious to manage this software at all, its too much advanced, much undocumented personalizable things, and not much user-friendly for all that.
Then recently I migrated to Stardock's WindowBlinds because I loved your marvelous Flat Dark theme and the advantage that Windowblinds offers in comparison because I don't need to manually modify/update/maintain a theme for every new build of Windows 10 for compatibility (a thing required using other non-Stardock tools), neither I don't need to install any UX patch (however, a Stardock's Windows service must be installed and running all the time in background, but I consider that a solution less intrusive than replacing the UX related dlls), so I thought that it would be more easy, stable and complete solution to personalize or create a custom theme using a professional product of Stardock, but then I found that I was wrong, because yes WindowBlinds has good things, it has a wizard very user-friendly, it is a robust software solution, but it is very limited in terms of things that can be personalized in comparison to other tools mentioned, and it seems there is no way to change the color of file collision dialogs neither some of the Control panel parts/recources... or just no body seems to know how to change the color I need with Windowblinds.
