How to make taskbar black?

[XxPoNaGeXx]

Hey, so no matter what I do, my windows 10 taskbar stays grey. I want to make it black. Like in the default of windows ten. As you can tell by my settings the preview shows it should be black but in reality it's grey:

And my settings are:

I've also tried changing it back to default windows theme and it didn't change the colour to black

I'd really appreciate any help.

 

[Colif]

It seems enabling transparency should allow it to be black

Have you tried making black as a custom color?