@phobson I hope you are ok with me making a few changes on top of your PR so we can get it merged before we cut the 2.x beta. I have tried to do a few modifications as possible to restore old default behaviours with matplotlib 1.5.x classic style and fix the tests. Let me know if you can spot any issues.
Otherwise I think this is ready for review. I will need to squash all image changes together before merging but prefer that to wait until this has been reviewed.

@jenshnielsen absolutely! sorry i was lagging behind

Something is not right here, the output from http://matplotlib.org/examples/pylab_examples/boxplot_demo.html does not seem to respect the color (either on this branch or v1.5.1) but does work on master http://matplotlib.org/devdocs/examples/pylab_examples/boxplot_demo.html

@tacaswell that is weird. I'm not sure what's going on.

@jenshnielsen I'm not sure why the medians aren't showing up in this example either: https://github.com/matplotlib/matplotlib/pull/6481/files#diff-b5878226d9a3230ab74d34de5a0f994f

@tacaswell I fixed the color issue (The flier color was set by the marker argument but not the face and edgecolor which was set to default values)

The effect of the color can also be seen in the changes to boxplot_mod_artists_after_plotting.png
The fliers used to have their color set from

bp = ax.boxplot(x, sym="o")
    for key in bp:
        for obj in bp[key]:
            obj.set_color('green')

This is no longer the case because edge and facecolor now takes effect

Running out of time to look more at this at the moment. I will try to get back to it later today.

This will need some test image updated after the fix above.

There seems to be something wrong with test_bxp_custompatchartist
the linestyle is not correctly reflected in the test image (dotted)

@phobson Sorry for being stupid but can you point me exactly to which example is missing the median?
I can only see bxp_patchartist.png which simply has the same patch color as the plotted under the median making it hard to see

@jenshnielsen happily. It's right here: https://github.com/matplotlib/matplotlib/pull/6481/files#diff-b5878226d9a3230ab74d34de5a0f994f

oddly, the custom patch artist example is fine.
https://github.com/matplotlib/matplotlib/pull/6481/files#diff-ac6c423875c2703c15afceabfdaf3692

So we are talkign about bxp_patchartist.png?
In that test we are plotting a median which has the color C0 on top of a patch with a color C0 so naturally it's not really visible.

We should probably either change the default median color or change the default patch color to use some thing else than patch.facecolor

Oh yeah. That makes sense. This is tricky. My preference is that if we're filling in the box with a patch artist, the the median should be the same color as the border of the patch artist. 

Sorry if this was unintelligible. I'm on my phone.

On Mon, May 30, 2016 at 7:48 AM -0700, "Jens Hedegaard Nielsen" [email protected] wrote:

So we are talkign about bxp_patchartist.png?

In that test we are plotting a median which has the color C0 on top of a patch with a color C0 so naturally it's not really visible.

We should probably either change the default median color or change the default patch color to use some thing else than patch.facecolor

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Thats not really easy to do unfortunately. To do that I think we would need to add a different rc param for the median color when using patch. I changed the defaults mean and median to C1 and C2 which are different from the patch color. I squashed the image changing commits together

backported to v2.x as ff98856

thanks @tacaswell and @jenshnielsen !!