散布図へ色を付ける方法

import matplotlib.pyplot as plt
from scipy.stats import gaussian_kde

x=(np.array([np.arange(0, 2.11,0.03 )]*len(index))).flatten()
y=GA[index,19:19+71].flatten()
xy=np.vstack([x,y])
z=gaussian_kde(xy)(xy)

plt.figure(figsize=(5, 3), dpi=100)
plt.title('Pitch')
plt.scatter(x,y,c=z,s=10)
plt.grid(True)
plt.ylim(0,0.1)
plt.xlabel(" [rad/s]")
plt.ylabel("[deg^2/s]")
plt.show()