How to change the default color of the Command Prompt?

Open a Command Prompt, click the icon (top-left), select Properties.

Choose Colors, adjust to taste. It will ask you if you want to save the colour for future settings - choose yes.

Using the Command Prompt type regedit to open the Windows Registry, then set the following entry to the color combination you prefer (DefaultColor):

HKEY_CURRENT_USER/Software/Microsoft/Command Processor/
Set DefaultColor to 0a

Go to a command prompt and type help color then press ENTER.

You can also select the command prompt icon and change its properties.