Backport PR #5758: Applied bug fix: using fc and ec did not properly set the figure canvas ...

...facecolor and edgecolor. This is resolves issue  #5553 in which rcParams['figure.facecolor'] is ignored. The fix is now applied to master.

IPython/core/pylabtools.py

@@ -118,8 +118,8 b" def print_figure(fig, fmt='png', bbox_inches='tight', **kwargs):"
     # build keyword args
     kw = dict(
         format=fmt,
-        fc=fig.get_facecolor(),
-        ec=fig.get_edgecolor(),
+        facecolor=fig.get_facecolor(),
+        edgecolor=fig.get_edgecolor(),
         dpi=dpi,
         bbox_inches=bbox_inches,
     )