improve if block logic

Author: TimidRobot

ccos/norm/models.py

@@ -76,7 +76,7 @@ def color(self):
         color = self.own_color
         if color is None and self.group is not None:
             color = self.group.color
-        if color is None:
+        elif color is None:
             color = COLORS["BLACK"]
         elif color in COLORS:
             color = COLORS[color]