VibranceGUI is a Windows desktop utility (C#, .NET Framework 4.0, Windows Forms) that automatically adjusts NVIDIA Digital Vibrance Control and AMD Saturation levels per application. It runs in the system tray, monitors foreground window changes via WinEventHook, and applies user-defined vibrance settings for each game or process. The architecture is a monolith with a main form (VibranceGUI), a settings controller (INI/XML persistence), and GPU vendor-specific proxies (NvidiaDynamicVibranceProxy, AmdDynamicVibranceProxy) that interface with native driver APIs (nvapi.dll, ADL). Key entry points are Program.cs (adapter detection and form creation) and the tray icon context menu. External dependencies include the native GPU driver DLLs and the Windows API for display changes and process enumeration. The codebase is functional but shows signs of age: no unit tests, legacy .NET patterns, hardcoded DLL paths, and x86-only compilation.