An old project resurrected from the times of .NET 2.0 (2006!) - it's a simple color capture application for Windows, able to snag the color of any pixel of any application on the desktop.
Requires: .NET 2.0 Runtime Redistributable
Modern versions of Windows should include .NET runtimes at least up to 4.5, but in case it's needed it can be downloaded directly from Microsoft:
Download .NET 2.0 Redist 32-bit version
Download .NET 2.0 Redist 64-bit version