The value DefaultColor controls the foreground and background colors used in command prompt windows. It has a default value of 0, for standard white text on a black background.
You can replace this value with a two-digit hexadecimal number, in which the first digit selects a background color and the second a foreground color.
A value of F0, for example, would give black text on a white background, and 1E would yield yellow text on a blue background.
Key: [HKEY_CURRENT_USER\Software\Microsoft\Command Processor]
Value Name: DefaultColor
Data Type: REG_DWORD
Data: (0 = default)