diff -r 2bb806539ca6 Lib/test/test_turtle.py
--- a/Lib/test/test_turtle.py	Sat Jun 04 20:53:38 2016 -0700
+++ b/Lib/test/test_turtle.py	Sun Jun 05 09:18:32 2016 -0700
@@ -396,5 +396,43 @@
         self.assertTrue(tpen.isvisible())
 
 
+class TestScreen(unittest.TestCase):
+
+    @support.requires_resource('gui')
+    def test_fillcolor(self):
+        expected = (0., 0., 0.)
+
+        turtle.fillcolor((0, 0, 0))
+        self.assertEqual(turtle.fillcolor(), expected)
+
+        turtle.fillcolor(0, 0, 0)
+        self.assertEqual(turtle.fillcolor(), expected)
+
+        turtle.fillcolor((0., 0., 0.))
+        self.assertEqual(turtle.fillcolor(), expected)
+
+        turtle.fillcolor(0., 0., 0.)
+        self.assertEqual(turtle.fillcolor(), expected)
+
+        with self.assertRaisesRegex(turtle.TurtleGraphicsError,
+                                    'bad color arguments'):
+            turtle.fillcolor((1,))
+
+        with self.assertRaisesRegex(turtle.TurtleGraphicsError,
+                                    'bad color arguments'):
+            turtle.fillcolor(1)
+
+        with self.assertRaisesRegex(turtle.TurtleGraphicsError,
+                                    'bad color sequence'):
+            turtle.fillcolor((300, 500, 400))
+
+        with self.assertRaisesRegex(turtle.TurtleGraphicsError,
+                                    'bad color sequence'):
+            turtle.fillcolor(300, 500, 400)
+
+        with self.assertRaises(TypeError):
+            turtle.fillcolor((None, (), 'spam'))
+
+
 if __name__ == '__main__':
     unittest.main()
diff -r 2bb806539ca6 Lib/turtle.py
--- a/Lib/turtle.py	Sat Jun 04 20:53:38 2016 -0700
+++ b/Lib/turtle.py	Sun Jun 05 09:18:32 2016 -0700
@@ -1156,12 +1156,22 @@
                 return color
             else:
                 raise TurtleGraphicsError("bad color string: %s" % str(color))
+        return self._color_triple_to_hexstring(color)
+
+    def _color_triple_to_hexstring(self, color):
+        """Return color string corresponding to the hex triple given in color.
+
+        The argument must be a tuple of three numbers in the range 0<=n<=colormode.
+
+        """
         try:
             r, g, b = color
         except:
             raise TurtleGraphicsError("bad color arguments: %s" % str(color))
         if self._colormode == 1.0:
             r, g, b = [round(255.0*x) for x in (r, g, b)]
+        else:
+            r, g, b = [round(x) for x in (r, g, b)]
         if not ((0 <= r <= 255) and (0 <= g <= 255) and (0 <= b <= 255)):
             raise TurtleGraphicsError("bad color sequence: %s" % str(color))
         return "#%02x%02x%02x" % (r, g, b)
@@ -2700,15 +2710,7 @@
         """
         if isinstance(args, str):
             return args
-        try:
-            r, g, b = args
-        except:
-            raise TurtleGraphicsError("bad color arguments: %s" % str(args))
-        if self.screen._colormode == 1.0:
-            r, g, b = [round(255.0*x) for x in (r, g, b)]
-        if not ((0 <= r <= 255) and (0 <= g <= 255) and (0 <= b <= 255)):
-            raise TurtleGraphicsError("bad color sequence: %s" % str(args))
-        return "#%02x%02x%02x" % (r, g, b)
+        return self.screen._color_triple_to_hexstring(args)
 
     def clone(self):
         """Create and return a clone of the turtle.