Variable: pong-blank-color
pong-blank-color is a customizable variable defined in pong.el.gz.
Value
"black"
Documentation
Color used for background.
Source Code
;; Defined in /usr/src/emacs/lisp/play/pong.el.gz
(defcustom pong-blank-color "black"
"Color used for background."
:type 'color)