diff --git a/phypno/viz/base.py b/phypno/viz/base.py
index <HASH>..<HASH> 100644
--- a/phypno/viz/base.py
+++ b/phypno/viz/base.py
@@ -78,7 +78,7 @@ class Colormap(ColorMap):
             pos = linspace(limits[0], limits[1], coolwarm.shape[0])
             color = coolwarm
 
-        color = c_[color, 255 * ones((color.shape[0], 1))]
+        # color = c_[color, 255 * ones((color.shape[0], 1))]
         super().__init__(pos, color)
revert to not using alpha, apparently it messes up opengl