Bug report

Bug summary

With temporary styling, using colors with respect to the color cycle, like'C0', is ignored ifplt.show() is called outside of thewith block. It only works properly ifplt.show() is called inside the block.

Code for reproduction

This reproduces the bug:

importmatplotlib.pyplotaspltwithplt.style.context('seaborn'):plt.axhline(0,color='C0')plt.axhline(1,color='C1')plt.axhline(2,color='C2')plt.show()

This works fine and is the expected behavior:

importmatplotlib.pyplotaspltwithplt.style.context('seaborn'):plt.axhline(0,color='C0')plt.axhline(1,color='C1')plt.axhline(2,color='C2')plt.show()

Actual outcome

Please note that other elements of the style are working fine, such as the grid.

Expected outcome

Matplotlib version

• Operating system: Solus Linux
• Matplotlib version: 2.2.2
• Matplotlib backend (print(matplotlib.get_backend())): TkAgg
• Python version: 3.6.5

Using matplotlib packaged by the linux distribution.