Errorbar plot transparency overlapping - matplotlib

Question

In an errorbar matplotlib plot, the main line, the markers and the errorbars of a same color overlap each other on their countour when I use the alpha parameter. Although my goal was to have a transparency between the two different colors, but not within the same color, as if same color lines, markers and errorbars were only one object. Is that possible?
import matplotlib.pyplot as plt
import numpy as np
Time = np.array([1, 2, 3])
Green = np.array([3, 5, 9])
Blue = np.array([4, 7, 13])
Green_StDev = np.array([0.6, 0.6, 0.7])
Blue_StDev = np.array([0.5, 0.5, 0.6])
plt.errorbar(Time, Green, Green_StDev, marker='o', c='green', alpha=0.5)
plt.errorbar(Time, Blue, Blue_StDev, marker='o', c='blue', alpha=0.5)
plt.show()
Like the example below, but with transparency only between different color objects, differently of the example above.

Answer 1

I think you cannot draw them as one single object since they (marker and error bar) are drawn individually. However, to make it more 'aesthetic', you could redraw a non-transparent marker:
import matplotlib.pyplot as plt
import numpy as np
Time = np.array([1, 2, 3])
Green = np.array([3, 5, 9])
Blue = np.array([4, 7, 13])
Green_StDev = np.array([0.6, 0.6, 0.7])
Blue_StDev = np.array([0.5, 0.5, 0.6])
plt.errorbar(Time, Green, Green_StDev, marker='o', c='green', alpha=0.5)
# Add additional marker
plt.scatter(Time, Green,marker='o', c='green')
plt.errorbar(Time, Blue, Blue_StDev, marker='o', c='blue', alpha=0.5)
# Add additional marker
plt.scatter(Time, Blue, marker='o', c='blue')
plt.show()