diff --git a/homeassistant/components/light/__init__.py b/homeassistant/components/light/__init__.py
index 28784d13218..6c4e9e34333 100644
--- a/homeassistant/components/light/__init__.py
+++ b/homeassistant/components/light/__init__.py
@@ -87,8 +87,10 @@ LIGHT_TURN_ON_SCHEMA = vol.Schema({
     ATTR_PROFILE: str,
     ATTR_TRANSITION: VALID_TRANSITION,
     ATTR_BRIGHTNESS: vol.All(int, vol.Range(min=0, max=255)),
-    ATTR_RGB_COLOR: vol.ExactSequence((cv.byte, cv.byte, cv.byte)),
-    ATTR_XY_COLOR: vol.ExactSequence((cv.small_float, cv.small_float)),
+    ATTR_RGB_COLOR: vol.All(vol.ExactSequence((cv.byte, cv.byte, cv.byte)),
+                            vol.Coerce(tuple)),
+    ATTR_XY_COLOR: vol.All(vol.ExactSequence((cv.small_float, cv.small_float)),
+                           vol.Coerce(tuple)),
     ATTR_COLOR_TEMP: vol.All(int, vol.Range(min=154, max=500)),
     ATTR_FLASH: [FLASH_SHORT, FLASH_LONG],
     ATTR_EFFECT: [EFFECT_COLORLOOP, EFFECT_RANDOM, EFFECT_WHITE],
@@ -222,7 +224,7 @@ def setup(hass, config):
         profile = profiles.get(params.pop(ATTR_PROFILE, None))
 
         if profile:
-            params.setdefault(ATTR_XY_COLOR, list(profile[:2]))
+            params.setdefault(ATTR_XY_COLOR, profile[:2])
             params.setdefault(ATTR_BRIGHTNESS, profile[2])
 
         for light in target_lights:
diff --git a/tests/components/light/test_init.py b/tests/components/light/test_init.py
index 0d75a9b811a..1f6619c8b12 100644
--- a/tests/components/light/test_init.py
+++ b/tests/components/light/test_init.py
@@ -170,8 +170,8 @@ class TestLight(unittest.TestCase):
         light.turn_on(self.hass, dev1.entity_id,
                       transition=10, brightness=20)
         light.turn_on(
-            self.hass, dev2.entity_id, rgb_color=[255, 255, 255])
-        light.turn_on(self.hass, dev3.entity_id, xy_color=[.4, .6])
+            self.hass, dev2.entity_id, rgb_color=(255, 255, 255))
+        light.turn_on(self.hass, dev3.entity_id, xy_color=(.4, .6))
 
         self.hass.pool.block_till_done()
 
@@ -182,10 +182,10 @@ class TestLight(unittest.TestCase):
             data)
 
         method, data = dev2.last_call('turn_on')
-        self.assertEquals(data[light.ATTR_RGB_COLOR], [255, 255, 255])
+        self.assertEquals(data[light.ATTR_RGB_COLOR], (255, 255, 255))
 
         method, data = dev3.last_call('turn_on')
-        self.assertEqual({light.ATTR_XY_COLOR: [.4, .6]}, data)
+        self.assertEqual({light.ATTR_XY_COLOR: (.4, .6)}, data)
 
         # One of the light profiles
         prof_name, prof_x, prof_y, prof_bri = 'relax', 0.5119, 0.4147, 144
@@ -195,20 +195,20 @@ class TestLight(unittest.TestCase):
         # Specify a profile and attributes to overwrite it
         light.turn_on(
             self.hass, dev2.entity_id,
-            profile=prof_name, brightness=100, xy_color=[.4, .6])
+            profile=prof_name, brightness=100, xy_color=(.4, .6))
 
         self.hass.pool.block_till_done()
 
         method, data = dev1.last_call('turn_on')
         self.assertEqual(
             {light.ATTR_BRIGHTNESS: prof_bri,
-             light.ATTR_XY_COLOR: [prof_x, prof_y]},
+             light.ATTR_XY_COLOR: (prof_x, prof_y)},
             data)
 
         method, data = dev2.last_call('turn_on')
         self.assertEqual(
             {light.ATTR_BRIGHTNESS: 100,
-             light.ATTR_XY_COLOR: [.4, .6]},
+             light.ATTR_XY_COLOR: (.4, .6)},
             data)
 
         # Test shitty data
@@ -278,5 +278,5 @@ class TestLight(unittest.TestCase):
         method, data = dev1.last_call('turn_on')
 
         self.assertEqual(
-            {light.ATTR_XY_COLOR: [.4, .6], light.ATTR_BRIGHTNESS: 100},
+            {light.ATTR_XY_COLOR: (.4, .6), light.ATTR_BRIGHTNESS: 100},
             data)
diff --git a/tests/components/light/test_mqtt.py b/tests/components/light/test_mqtt.py
index 10f352580db..d9343908f46 100644
--- a/tests/components/light/test_mqtt.py
+++ b/tests/components/light/test_mqtt.py
@@ -305,7 +305,7 @@ class TestLightMQTT(unittest.TestCase):
 
         state = self.hass.states.get('light.test')
         self.assertEqual(STATE_ON, state.state)
-        self.assertEqual([75, 75, 75], state.attributes['rgb_color'])
+        self.assertEqual((75, 75, 75), state.attributes['rgb_color'])
         self.assertEqual(50, state.attributes['brightness'])
 
     def test_show_brightness_if_only_command_topic(self):