diff --git a/pykat/utilities/plotting/colormap.py b/pykat/utilities/plotting/colormap.py
index 2ea0e3da1dd0a1f3453496a0e3558bb10d9af5e4..03d4f39f4607f54f254e46eebe72fc4c81a762dd 100644
--- a/pykat/utilities/plotting/colormap.py
+++ b/pykat/utilities/plotting/colormap.py
@@ -8,7 +8,7 @@ import matplotlib.pyplot as plt
 # ====================== The Class ColorMapCreator ============================
 # =============================================================================
 
-class ColorMapCreator:
+class CM:
     """
     Class ColorMapCreator:
     Create diverging colormaps from RGB1 to RGB2 using the method of Moreland
diff --git a/pykat/utilities/plotting/tools.py b/pykat/utilities/plotting/tools.py
index b186826cebfc99b82830e3c7cb21769c510a0ad5..bc0e5f35dd05c86715208ffdfaaf31283c865d6e 100644
--- a/pykat/utilities/plotting/tools.py
+++ b/pykat/utilities/plotting/tools.py
@@ -7,6 +7,8 @@
 
 import numpy as np
 import matplotlib
+import matplotlib.backends.backend_pdf
+from matplotlib import cm
 BACKEND = 'Qt4Agg'
 matplotlib.use(BACKEND)
 from matplotlib import rc