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diff --git a/Readme.md b/Readme.md
index 38ed16c..1cef027 100644
--- a/Readme.md
+++ b/Readme.md
@@ -8,3 +8,8 @@ w_ctmax updraft velocity
 
 DWD OpenData: opendata.dwd.de
 ECMWF OpenData: https://www.ecmwf.int/en/forecasts/datasets/open-data
+
+## 
+
+https://matplotlib.org/3.1.1/gallery/color/colormap_reference.html
+https://unidata.github.io/MetPy/v1.0/api/generated/metpy.plots.ctables.html