Change Expose Glowing Border
In this tutorial we will go over on how to Change Expose Glowing Border in Snow Leopard. First we will need to use a graphic editor of your choice. Next we will need to go to the file directory as followed, HD - System - Library - CoreServices - Then find the Dock icon and control click or right click and select Show Package Contents. One you have done that go to Contents - Resources - and find the two images that we need to modify they are expose-window-selection-big.png & expose-window-selection-small.png here we will need to make our own or simply change the color to our choice. Keep in mind that once you do this you will need to open up Terminal so that we can reset our dock. See below for terminal command.
Terminal: killall Dock
hit enter & now you will have your new look.
Have Fun & Enjoy.