Bug report

Bug summary

plt.text(.5, .5, "foo", color=(0, 0, 0, 0)); plt.savefig("/tmp/test.svg") results in text being visible in the produced svg. Compare withplt.text(.5, .5, "foo", alpha=0); plt.savefig("/tmp/test.svg"), which correctly yields no visible text.

(The ps backend is also broken here as it yields visible text in both cases, but this is arguably less an issue because transparency support in PS can only be "faked" anyways.)

Code for reproduction

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Actual outcome

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Expected outcome

Matplotlib version

• Operating system: arch linux
• Matplotlib version: 2.1.2
• Matplotlib backend (print(matplotlib.get_backend())): svg
• Python version: 3.6
• Jupyter version (if applicable): n/a
• Other libraries: