<human>:  How can I get the color of the last figure in matplotlib?
<bot>: Here is some code to make a line plot with errorbars, `ebar`, from data `x, y, err` and set color of the errorbars to `y` (yellow)

ebar = plt.errorbar(x, y, yerr=err, ecolor='y')

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.