When I double click on a .ico file in Visual Studio 2010 (Professional), it opens what looks like an icon editor. It looks like it should be really easy to pick a color from th
The icon is built by an external app.
For Visual Studio 2008 & 2010 image editor, "Using the Image Editor, you can view 32-bit images, but you cannot edit them."
http://msdn.microsoft.com/en-us/library/s1dadd79.aspx