Watercolor

Watercolor is the name of a placeholder theme created by Microsoft during development of the Windows XP operating system. It debuted in build 5.1.2250 and the last known build to include it was build 2419. In build 2250, it was called Professional and was not enabled by default.

The Watercolor visual style (known as Professional before build 2410) is the visual style used in betas of Windows XP. It appears rather like Windows 2000 on the taskbar, and has a Windows XP Prototype start menu. The window bar is blue when active and salmon-pink when inactive. This appeared in Whistler from builds 2250 to 2419 and in build 2428 was replaced by Luna.