Matplotlib fill alpha changes color

Question

I am trying to make matplotlib create a fill that is very transparent by using the alpha command, but it seems to actually change the color. It's there a way to increase transparency without changing the color?

ax.fill_between(x, 0, y[0], facecolor='#614126', interpolate=True, alpha=.3)

Answer 1

I've run into a similar issue, where specifying an alpha value caused the color to revert to the default blue. In this case, I was able to override whatever was causing the change by using setp(), like so:

my_plot = ax.fill_between(x, 0, y[0], interpolate=True, alpha=.3)
matplotlib.pyplot.setp(my_plot, facecolor='#614126')