+(defface org-block-background '((t ()))
+ "Face used for the source block background.")
+
+(org-copy-face 'org-meta-line 'org-block-begin-line
+ "Face used for the line delimiting the begin of source blocks.")
+
+(org-copy-face 'org-meta-line 'org-block-end-line
+ "Face used for the line delimiting the end of source blocks.")
+