fix drucken script

cups-client/files/drucken.py

@@ -116,7 +116,7 @@ if args.custom_size:
 if args.media_type:
     command += ["-o", "MediaType="+args.media_type]
 if args.color:
-    command += ["-o", "ColorModel="+args.media_type]
+    command += ["-o", "ColorModel="+args.color]
 if args.landscape:
     command += ["-o", "landscape"]
 if args.pages_per_page and args.pages_per_page != '1':