frame-parameter The foreground-color frame parameter will be used.
+ frame-parameter The foreground-color frame parameter will be used.
+
NUMBER It's a real value between 0.0 (black) and 1.0 (white) that
indicate the gray color.
frame-parameter The background-color frame parameter will be used.
+ frame-parameter The background-color frame parameter will be used.
+
NUMBER It's a real value between 0.0 (black) and 1.0 (white) that
indicate the gray color.