@leocg Ok, thanks for clarifying.
But it's quite far from black(I mean toolbar) then, I clearly see the dark blue here for active part and more darker(almost black yes) for inactive part(where's minimize, close buttons). It can be checked by using color picker, both colors are from blue color spectrum.

@leocg I thought you mean that if I don't change theme to dark in Opera, but select dark theme n Windows(10), then Opera will use the same dark gray colors like Windows(that's why you see black).
I can't check it, but I was pretty sure that was the main purpose of recently implemented feature(DNA-76435 Support system dark mode in Windows 10).
If I'm wrong, and that feature just auto-enables the dark mode in Opera when I select dark theme in Windows, then this is a quite pointless feature.

@Shadeslayer I know that there is default support of dark theme since 74 chromium.
You can check it by adding --force-dark-mode key in shortcut's properties for Chrome in 'target' field(space and then key).
Menus and dropdowns look better than in Opera, but there is a still white border around. But if you run Edge(on chromium) with this key, I think you'll be surprised how nice it could look in Opera too.

PS. But they implemented system dark theme native support in Opera on Win10, I don't know what does it mean actually because I'm on Win 8.

@Shadeslayer dark gray(its shades) is still used for the internal pages background, OMenu, context menu. Toolbar, sidebar and some popups are dark/navy blue.

@Shadeslayer said in [BLUE] Dark Theme?:

Weird, mine is two shades of dark blue.

It's not weird, all have this color(dark navy blue) since the reborn3.

That's why I suggested to revert the settings 'circle' back and put there options that are directly refer to StartPage(wallpapers, tile size, News toggles). I don't need to see wallpapers options every time I open EasySetup menu from the toolbar, I need these options only while I'm on start page, to see the result of changing the wallpaper or activating News. It's more logical to keep these options separately.

@vlad-web So, in your case "_" button's action = "X" button?

I can't confirm this on Win8.1x64

Taking into account that there are one by one crashes in Stable releases, it's necessary to implement optional autoupdate module in Settings(like in FireFox), Instead of removing/renaming .exe every time. It was requested many times, anyway.