From 033197a091feff8e6e4e13258b43eae7c0e3160a Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Tue, 21 Mar 2017 06:48:21 -0500
Subject: [PATCH] Sort <colors> as they are written to plots.xml

---
 openmc/plots.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/openmc/plots.py b/openmc/plots.py
index 2ba5d9758..cc2fcc4b6 100644
--- a/openmc/plots.py
+++ b/openmc/plots.py
@@ -636,7 +636,8 @@ class Plot(object):
             subelement.text = ' '.join(str(x) for x in color)
 
         if self._colors:
-            for domain, color in self._colors.items():
+            for domain, color in sorted(self._colors.items(),
+                                        key=lambda x: x[0].id):
                 subelement = ET.SubElement(element, "color")
                 subelement.set("id", str(domain.id))
                 if isinstance(color, string_types):