I want to change the color of my logon screen picture box - possibly along with other interface elements - in Windows 7.
The image I'm talking about is the glossy bluish box surrounding the selected user's profile picture, such as the one when you lock the screen and get a password prompt.
I would like to open the files in some image editor, convert them to grayscale to fit my logon background color and overwrite the old ones.
Practically all I want to do is change the color, but there is no built-in way to do it (that I know of) and I guess it needs some file editing.
I realize there's an option to choose between 3 different colors for the "Switch User" button - unfortunately it doesn't change the picture box and password field arrow colors.
Q: Where might the image files be located, and how to bypass their protection (if applicable) so they're available for editing?
My system is Windows 7 Ultimate SP1 (64-bit), build 7601.