diff --git a/schainpy/model/graphics/jroplot_base.py b/schainpy/model/graphics/jroplot_base.py
index 612164d..f69f30f 100644
--- a/schainpy/model/graphics/jroplot_base.py
+++ b/schainpy/model/graphics/jroplot_base.py
@@ -20,7 +20,7 @@ import matplotlib,re
 if 'BACKEND' in os.environ:
     matplotlib.use(os.environ['BACKEND'])
 elif 'linux' in sys.platform:
-    matplotlib.use("Agg")#TkAgg
+    matplotlib.use("TkAgg")
 elif 'darwin' in sys.platform:
     matplotlib.use('MacOSX')
 else:
diff --git a/schainpy/model/graphics/plotting_codes.py b/schainpy/model/graphics/plotting_codes.py
index 6f7eafc..d69c658 100644
--- a/schainpy/model/graphics/plotting_codes.py
+++ b/schainpy/model/graphics/plotting_codes.py
@@ -53,7 +53,6 @@ reflectivity = [
     "#fe00fe", # 65
     "#8e59ff", # 70
     "#f0f0f0", # 75
-    "#cccccc" # 80
     ]
 
 velocity = [