Windows 10: Theme Color Not Changing?

This is a problem I've seen solved in Vista a lot, but isn't something I can find a help thread for at all with Windows 10. :/ I am unable to change the theme color from an icky blue. I can change the desktop, I can enable and disable the color on the Start, taskbar, etc., I can make them transparent. I cannot change the color. If I attempt to click a different accent color, nothing happens. No color change on the preview. No color change anywhere. Just icky blue. :c

I've made sure that the Theme service is running and I've tried installing themes online. Nothing I'm doing is getting this color to change and it's really buggin' me out.

It could have to do with this being an Origin laptop. It was originally Windows 8 when I got it wherein, as an Origin PC, it had a default-installed Origin theme where the accent colors were red and black. I was able to change the desktop background while it was in '8, but I was unable to ever change the accent from red. Now that I have Windows 10, I am not using the Origin-installed theme and my accent is not locked in red but is instead locked in blue. I'm really frustrated, ghgheh. I've not yet attempted a hard refresh of Windows 10, especially seeing as the refresh USB will simply install Win8 again with the Origin-brand-lock, so upgrading to '10 would only be extra time and stress for an issue that is going to happen in '8 and be brought forward again.

Is there a way to force the color scheme to change?

Thank you for any help.

I am running Windows 10 Home on an Origin PC. 16GB RAM; CPU i7 @ 2.8Ghz; I am indeed the administrator. If you need anything else, just ask. ;w;

The only real setting for color of the taskbar would be thru themes. Download themes that include the color you prefer.
Unless you use High Contrast themes then you can change the colors at will with this shortcut. Color and Appearance shortcut - Create in Windows 10 - Windows 10 Forums[1]=Shortcuts

I've tried that prior to posting this thread; downloading a theme made no difference. :/ Do you maybe have any other suggestions?