Imagine you have a simple dataframe to plot on a barplot like:
df = pd.DataFrame({'a':[1,2,3,4,5], 'b':[10,5,2,4,5]})
using seaborn:
sns.barplot(df['a'], df['b'], palette='Blues_d')
you can obtain something like:
then you can also play with the palette option and colormap adding a gradien...
