Penumbra by Scope10
Like the other themes we review in the rest of this list, Penumbra is not made by Microsoft. You’ll need to apply the patches above before and manually place the theme’s files in the right folder before you can use the theme. But once you have it set up, it’s a beautiful dark theme that makes using your system at night a pleasure.
Seda by unisira
Seda is another dark theme from DeviantArt. Unlike Penumbra, it’s not completely dark, with light grays sprucing up the interface. It also themes the context menu in a lovely dark gray to complete the look
Arc by neiio
ClassicX by neiio
ClassicX restores as much of the now-ancient Windows 3.1 operating system’s aesthetic as it can. If you’ve been hoping to return to gradient title bars, rectangular buttons and beveled edges, this theme will bring you there.
Simplify 10 Light by dpcdpc11
Simplify 10 Light is actually a pack of Windows 10 themes, all collected around the same simple aesthetic. It flattens the Windows interface as much as possible, relying on subtle variations in grey and white to distinguish different parts of the UI. It also shrinks the window control buttons, which may or may not be to your liking.