diff --git a/doc/conf.py b/doc/conf.py
index 3082f8c3..fe70071b 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -36,7 +36,7 @@ class Mock(object):
         else:
             return Mock()
 
-MOCK_MODULES = ['matplotlib', 'matplotlib.pyplot', 'pylab' ]
+MOCK_MODULES = ['matplotlib', 'matplotlib.color', 'matplotlib.pyplot', 'pylab' ]
 for mod_name in MOCK_MODULES:
     sys.modules[mod_name] = Mock()