fix: doc: format description typo !minor

JDongian · JDongian · commit 724f022e32c1 · 2016-01-22T01:08:27.000-06:00
diff --git a/colour.py b/colour.py
@@ -10,7 +10,7 @@
 -------
 
 HSL:
-    3-uple of Hue, Saturation, Value all between 0.0 and 1.0
+    3-uple of Hue, Saturation, Lightness all between 0.0 and 1.0
 
 RGB:
     3-uple of Red, Green, Blue all between 0.0 and 1.0
