DOC: example gray level in 'Specifying Colors' tutorial

tfiers · web-flow · commit 279dd607480d · 2020-09-12T01:56:52.000+02:00
To answer user question "what is light, what is dark?"
diff --git a/tutorials/colors/colors.py b/tutorials/colors/colors.py
@@ -14,7 +14,7 @@
   to ``'#aabbcc'``, or ``'#abcd'``, equivalent to ``'#aabbccdd'``;
   case-insensitive);
 * a string representation of a float value in ``[0, 1]`` inclusive for gray
-  level (e.g., ``'0.5'``);
+  level (e.g., ``'0.8'`` for light gray);
 * one of the characters ``{'b', 'g', 'r', 'c', 'm', 'y', 'k', 'w'}``, which
   are short-hand notations for shades of blue, green, red, cyan, magenta,
   yellow, black, and white. Note that the colors ``'g', 'c', 'm', 'y'`` do not
