diff -r c5fe0c7dad94 -r 57a22f699179 mercurial/debugcommands.py
--- a/mercurial/debugcommands.py	Sun Mar 26 21:43:47 2017 -0700
+++ b/mercurial/debugcommands.py	Sat Mar 25 13:50:17 2017 -0400
@@ -360,7 +360,7 @@
 def _debugdisplaycolor(ui):
     ui = ui.copy()
     ui._styles.clear()
-    for effect in color._effects.keys():
+    for effect in color._activeeffects(ui).keys():
         ui._styles[effect] = effect
     if ui._terminfoparams:
         for k, v in ui.configitems('color'):