fix typo

Author: MorvanZhou

numpy&pandas/18_plot.py

@@ -24,6 +24,6 @@
 # plot methods:
 # 'bar', 'hist', 'box', 'kde', 'area', scatter', hexbin', 'pie'
 ax = data.plot.scatter(x='A', y='B', color='DarkBlue', label="Class 1")
-data.plot.scatter(x='A', y='C', color='DarkGreen', label='Class 2', ax=ax)
+data.plot.scatter(x='A', y='C', color='LightGreen', label='Class 2', ax=ax)
 
 plt.show()