bpo-36176: Fix IDLE autocomplete & calltip popup colors. (GH-12262)


Prevent conflicts with Linux dark themes
(and slightly darken calltip background).
(cherry picked from commit 491ef53c1548c2b593d3c35d1e7bf25ccb443019)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index d2c150b..c343538 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,7 +3,11 @@
 ======================================
 
 
-bpl-36152: Remove colorizer.ColorDelegator.close_when_done and the
+bpo-36176: Fix IDLE autocomplete & calltip popup colors.
+Prevent conflicts with Linux dark themes
+(and slightly darken calltip background).
+
+bpo-36152: Remove colorizer.ColorDelegator.close_when_done and the
 corresponding argument of .close().  In IDLE, both have always been
 None or False since 2007.