@manish_kc_06 Do this:
wine_reviews.groupby("country").price.mean().sort_values(ascending = False)[:5].plot(kind = 'bar', color = ['red', 'green', 'blue', 'orange'])
wine_reviews.groupby("country").price.mean().sort_values(ascending = False)[:5].plot(kind = 'bar', color = ['red', 'green', 'blue', 'orange'])