Classic Color Panel is a utility software which is used for changing the color settings of the system-level display of Windows. The idea came up because Microsoft has strongly limited the Windows 10 options which allow to change the color of image elements (windows, buttons, controls etc.).
The functionality of Classic Color Panel is based on the fact that newer Windows versions include the settings of their predecessors from a compatibility point of view. A user cannot access these at the settings level. The operating system and certain programs can also manage these for compatibility reasons. Classic Color Panel is an option with a clear interface for the color settings which are not available to users.