Policy
Do not allow color changes
This policy setting controls the ability to change the color of window frames. If you enable this policy setting, you prevent users from changing the default window frame color. If you disable or do not configure this policy setting, you allow users to change the default window frame color. Note: This policy setting can be used in conjunction with the "Specify a default color for window frames" policy setting, to enforce a specific color for window frames that cannot be changed by users.
771a4a3feded DwmDisallowColorizationColorChanges_2 Registry
Copy registry mappings
HKLM\SOFTWARE\Policies\Microsoft\Windows\DWM\DisallowColorizationColorChanges (enabled) = 1
HKLM\SOFTWARE\Policies\Microsoft\Windows\DWM\DisallowColorizationColorChanges (disabled) = 0Policy notes
This policy setting controls the ability to change the color of window frames. If you enable this policy setting, you prevent users from changing the default window frame color. If you disable or do not configure this policy setting, you allow users to change the default window frame color. Note: This policy setting can be used in conjunction with the "Specify a default color for window frames" policy setting, to enforce a specific color for window frames that cannot be changed by users.