Merge pull request matplotlib#28156 from anntzer/dbsfc

Don't set savefig.facecolor/edgecolor in dark_background/538 styles.

Author: tacaswell

doc/api/next_api_changes/behavior/28156-AL.rst

@@ -0,0 +1,12 @@
+dark_background and fivethirtyeight styles no longer set ``savefig.facecolor`` and ``savefig.edgecolor``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When using these styles, :rc:`savefig.facecolor` and :rc:`savefig.edgecolor`
+now inherit the global default value of "auto", which means that the actual
+figure colors will be used.  Previously, these rcParams were set to the same
+values as :rc:`figure.facecolor` and :rc:`figure.edgecolor`, i.e. a saved
+figure would always use the theme colors even if the user manually overrode
+them; this is no longer the case.
+
+This change should have no impact for users that do not manually set the figure
+face and edge colors.

lib/matplotlib/mpl-data/stylelib/dark_background.mplstyle

@@ -18,9 +18,6 @@ grid.color: white
 figure.facecolor: black
 figure.edgecolor: black
 
-savefig.facecolor: black
-savefig.edgecolor: black
-
 ### Boxplots
 boxplot.boxprops.color: white
 boxplot.capprops.color: white

lib/matplotlib/mpl-data/stylelib/fivethirtyeight.mplstyle

@@ -29,10 +29,7 @@ xtick.minor.size: 0
 ytick.major.size: 0
 ytick.minor.size: 0
 
-font.size:14.0
-
-savefig.edgecolor: f0f0f0
-savefig.facecolor: f0f0f0
+font.size: 14.0
 
 figure.subplot.left: 0.08
 figure.subplot.right: 0.95