put color values in quotes

nekoswag · sfan5 · commit cca7072eab35 · 2018-02-01T14:30:36.000+01:00
the command line doesn't seem to like the "#" char, see https://forum.minetest.net/viewtopic.php?p=182380#p182380
diff --git a/README.rst b/README.rst
@@ -54,16 +54,16 @@ Parameters
 ^^^^^^^^^^
 
 bgcolor:
-    Background color of image, e.g. ``--bgcolor #ffffff``
+    Background color of image, e.g. ``--bgcolor '#ffffff'``
 
 scalecolor:
-    Color of scale, e.g. ``--scalecolor #000000``
+    Color of scale, e.g. ``--scalecolor '#000000'``
 
 playercolor:
-    Color of player indicators, e.g. ``--playercolor #ff0000``
+    Color of player indicators, e.g. ``--playercolor '#ff0000'``
 
 origincolor:
-    Color of origin indicator, e.g. ``--origincolor #ff0000``
+    Color of origin indicator, e.g. ``--origincolor '#ff0000'``
 
 drawscale:
     Draw tick marks, ``--drawscale``
