Prevent specifying text color
Supported on: At least Internet Explorer 7.0
Registry
HKCU
Software\Policies\Microsoft\Internet Explorer\Settings Options
Text Color text Description
This policy setting prevents the user from specifying the text color in Internet Explorer. If you enable this policy setting, the user cannot specify the text color in Internet Explorer. You must specify the text color (for example: 192,192,192). If you disable or do not configure this policy setting, the user can specify the text color in Internet Explorer.