diff --git a/homeassistant/components/emulated_hue/hue_api.py b/homeassistant/components/emulated_hue/hue_api.py
index 51580a28adf..1630405a73e 100644
--- a/homeassistant/components/emulated_hue/hue_api.py
+++ b/homeassistant/components/emulated_hue/hue_api.py
@@ -43,9 +43,12 @@ from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
     ATTR_COLOR_TEMP,
     ATTR_HS_COLOR,
+    ATTR_TRANSITION,
+    ATTR_XY_COLOR,
     SUPPORT_BRIGHTNESS,
     SUPPORT_COLOR,
     SUPPORT_COLOR_TEMP,
+    SUPPORT_TRANSITION,
 )
 from homeassistant.components.media_player.const import (
     ATTR_MEDIA_VOLUME_LEVEL,
@@ -82,6 +85,8 @@ STATE_COLORMODE = "colormode"
 STATE_HUE = "hue"
 STATE_SATURATION = "sat"
 STATE_COLOR_TEMP = "ct"
+STATE_TRANSITON = "tt"
+STATE_XY = "xy"
 
 # Hue API states, defined separately in case they change
 HUE_API_STATE_ON = "on"
@@ -90,7 +95,9 @@ HUE_API_STATE_COLORMODE = "colormode"
 HUE_API_STATE_HUE = "hue"
 HUE_API_STATE_SAT = "sat"
 HUE_API_STATE_CT = "ct"
+HUE_API_STATE_XY = "xy"
 HUE_API_STATE_EFFECT = "effect"
+HUE_API_STATE_TRANSITION = "transitiontime"
 
 # Hue API min/max values - https://developers.meethue.com/develop/hue-api/lights-api/
 HUE_API_STATE_BRI_MIN = 1  # Brightness
@@ -357,6 +364,8 @@ class HueOneLightChangeView(HomeAssistantView):
             STATE_HUE: None,
             STATE_SATURATION: None,
             STATE_COLOR_TEMP: None,
+            STATE_XY: None,
+            STATE_TRANSITON: None,
         }
 
         if HUE_API_STATE_ON in request_json:
@@ -372,6 +381,7 @@ class HueOneLightChangeView(HomeAssistantView):
             (HUE_API_STATE_HUE, STATE_HUE),
             (HUE_API_STATE_SAT, STATE_SATURATION),
             (HUE_API_STATE_CT, STATE_COLOR_TEMP),
+            (HUE_API_STATE_TRANSITION, STATE_TRANSITON),
         ):
             if key in request_json:
                 try:
@@ -379,6 +389,17 @@ class HueOneLightChangeView(HomeAssistantView):
                 except ValueError:
                     _LOGGER.error("Unable to parse data (2): %s", request_json)
                     return self.json_message("Bad request", HTTP_BAD_REQUEST)
+        if HUE_API_STATE_XY in request_json:
+            try:
+                parsed[STATE_XY] = tuple(
+                    (
+                        float(request_json[HUE_API_STATE_XY][0]),
+                        float(request_json[HUE_API_STATE_XY][1]),
+                    )
+                )
+            except ValueError:
+                _LOGGER.error("Unable to parse data (2): %s", request_json)
+                return self.json_message("Bad request", HTTP_BAD_REQUEST)
 
         if HUE_API_STATE_BRI in request_json:
             if entity.domain == light.DOMAIN:
@@ -444,10 +465,17 @@ class HueOneLightChangeView(HomeAssistantView):
 
                         data[ATTR_HS_COLOR] = (hue, sat)
 
+                    if parsed[STATE_XY] is not None:
+                        data[ATTR_XY_COLOR] = parsed[STATE_XY]
+
                 if entity_features & SUPPORT_COLOR_TEMP:
                     if parsed[STATE_COLOR_TEMP] is not None:
                         data[ATTR_COLOR_TEMP] = parsed[STATE_COLOR_TEMP]
 
+                if entity_features & SUPPORT_TRANSITION:
+                    if parsed[STATE_TRANSITON] is not None:
+                        data[ATTR_TRANSITION] = parsed[STATE_TRANSITON] / 10
+
         # If the requested entity is a script, add some variables
         elif entity.domain == script.DOMAIN:
             data["variables"] = {
@@ -557,6 +585,8 @@ class HueOneLightChangeView(HomeAssistantView):
             (STATE_HUE, HUE_API_STATE_HUE),
             (STATE_SATURATION, HUE_API_STATE_SAT),
             (STATE_COLOR_TEMP, HUE_API_STATE_CT),
+            (STATE_XY, HUE_API_STATE_XY),
+            (STATE_TRANSITON, HUE_API_STATE_TRANSITION),
         ):
             if parsed[key] is not None:
                 json_response.append(
diff --git a/tests/components/emulated_hue/test_hue_api.py b/tests/components/emulated_hue/test_hue_api.py
index 04832f4adc7..e3f965616f9 100644
--- a/tests/components/emulated_hue/test_hue_api.py
+++ b/tests/components/emulated_hue/test_hue_api.py
@@ -28,6 +28,8 @@ from homeassistant.components.emulated_hue.hue_api import (
     HUE_API_STATE_HUE,
     HUE_API_STATE_ON,
     HUE_API_STATE_SAT,
+    HUE_API_STATE_TRANSITION,
+    HUE_API_STATE_XY,
     HUE_API_USERNAME,
     HueAllGroupsStateView,
     HueAllLightsStateView,
@@ -39,6 +41,7 @@ from homeassistant.components.emulated_hue.hue_api import (
 )
 from homeassistant.const import (
     ATTR_ENTITY_ID,
+    ATTR_SUPPORTED_FEATURES,
     CONTENT_TYPE_JSON,
     HTTP_NOT_FOUND,
     HTTP_OK,
@@ -51,7 +54,11 @@ from homeassistant.const import (
 from homeassistant.core import callback
 import homeassistant.util.dt as dt_util
 
-from tests.common import async_fire_time_changed, get_test_instance_port
+from tests.common import (
+    async_fire_time_changed,
+    async_mock_service,
+    get_test_instance_port,
+)
 
 HTTP_SERVER_PORT = get_test_instance_port()
 BRIDGE_SERVER_PORT = get_test_instance_port()
@@ -663,6 +670,25 @@ async def test_put_light_state(hass, hass_hue, hue_client):
     assert ceiling_json["state"][HUE_API_STATE_HUE] == 4369
     assert ceiling_json["state"][HUE_API_STATE_SAT] == 127
 
+    # update light state through api
+    await perform_put_light_state(
+        hass_hue,
+        hue_client,
+        "light.ceiling_lights",
+        True,
+        brightness=100,
+        xy=((0.488, 0.48)),
+    )
+
+    # go through api to get the state back
+    ceiling_json = await perform_get_light_state(
+        hue_client, "light.ceiling_lights", HTTP_OK
+    )
+    assert ceiling_json["state"][HUE_API_STATE_BRI] == 100
+    assert hass.states.get("light.ceiling_lights").attributes[light.ATTR_XY_COLOR] == (
+        (0.488, 0.48)
+    )
+
     # Go through the API to turn it off
     ceiling_result = await perform_put_light_state(
         hass_hue, hue_client, "light.ceiling_lights", False
@@ -714,6 +740,30 @@ async def test_put_light_state(hass, hass_hue, hue_client):
         == 50
     )
 
+    # mock light.turn_on call
+    hass.states.async_set(
+        "light.ceiling_lights", STATE_ON, {ATTR_SUPPORTED_FEATURES: 55}
+    )
+    call_turn_on = async_mock_service(hass, "light", "turn_on")
+
+    # update light state through api
+    await perform_put_light_state(
+        hass_hue,
+        hue_client,
+        "light.ceiling_lights",
+        True,
+        brightness=99,
+        xy=((0.488, 0.48)),
+        transitiontime=60,
+    )
+
+    await hass.async_block_till_done()
+    assert call_turn_on[0]
+    assert call_turn_on[0].data[ATTR_ENTITY_ID] == ["light.ceiling_lights"]
+    assert call_turn_on[0].data[light.ATTR_BRIGHTNESS] == 99
+    assert call_turn_on[0].data[light.ATTR_XY_COLOR] == ((0.488, 0.48))
+    assert call_turn_on[0].data[light.ATTR_TRANSITION] == 6
+
 
 async def test_put_light_state_script(hass, hass_hue, hue_client):
     """Test the setting of script variables."""
@@ -1173,6 +1223,8 @@ async def perform_put_light_state(
     saturation=None,
     color_temp=None,
     with_state=True,
+    xy=None,
+    transitiontime=None,
 ):
     """Test the setting of a light state."""
     req_headers = {"Content-Type": content_type}
@@ -1188,8 +1240,12 @@ async def perform_put_light_state(
         data[HUE_API_STATE_HUE] = hue
     if saturation is not None:
         data[HUE_API_STATE_SAT] = saturation
+    if xy is not None:
+        data[HUE_API_STATE_XY] = xy
     if color_temp is not None:
         data[HUE_API_STATE_CT] = color_temp
+    if transitiontime is not None:
+        data[HUE_API_STATE_TRANSITION] = transitiontime
 
     entity_number = ENTITY_NUMBERS_BY_ID[entity_id]
     result = await client.put(