While its not exactly Windows 10, MIcrosoft's design system is called "Fluent UI"[0] which includes what they use for the Web. It features a similar flat UI but

While its not exactly Windows 10, MIcrosoft's design system is called "Fluent UI"[0] which includes what they use for the Web. It features a similar flat UI but isn't exactly a copy of Windows 10, it does it's own thing. The components are also unfortunately tied to React. [0]https://developer.microsoft.com/en-us/fluentui#/ https://developer.microsoft.com/en-us/fluentui#/