When a file is compressed in Windows NT, there is an option in Explorer to display it in a different color to easily distinguish them. This setting defines what color to use, the default is blue.
Open the key below, and modify the value of ‘AltColor’ to a hexidecimal value representing the color you want the files to be display using.
Exit and reboot.
Note:
The option to “Display compressed files and folders with alternate color” must be enabled, this is found under ‘View | Options | View’ in any explorer window.
Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]
Value Name: AltColor
Data Type: REG_BINARY
Data: 00 00 ff 00 (default)