diff --git a/homeassistant/components/homekit/type_lights.py b/homeassistant/components/homekit/type_lights.py
index 612d8e53a02..086934ea6f7 100644
--- a/homeassistant/components/homekit/type_lights.py
+++ b/homeassistant/components/homekit/type_lights.py
@@ -24,6 +24,10 @@ from homeassistant.const import (
     STATE_ON,
 )
 from homeassistant.core import callback
+from homeassistant.util.color import (
+    color_temperature_mired_to_kelvin,
+    color_temperature_to_hs,
+)
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -64,8 +68,6 @@ class Light(HomeAccessory):
         if self._features & SUPPORT_COLOR:
             self.chars.append(CHAR_HUE)
             self.chars.append(CHAR_SATURATION)
-            self._hue = None
-            self._saturation = None
         elif self._features & SUPPORT_COLOR_TEMP:
             # ColorTemperature and Hue characteristic should not be
             # exposed both. Both states are tracked separately in HomeKit,
@@ -179,7 +181,16 @@ class Light(HomeAccessory):
 
         # Handle Color
         if CHAR_SATURATION in self.chars and CHAR_HUE in self.chars:
-            hue, saturation = new_state.attributes.get(ATTR_HS_COLOR, (None, None))
+            if ATTR_HS_COLOR in new_state.attributes:
+                hue, saturation = new_state.attributes[ATTR_HS_COLOR]
+            elif ATTR_COLOR_TEMP in new_state.attributes:
+                hue, saturation = color_temperature_to_hs(
+                    color_temperature_mired_to_kelvin(
+                        new_state.attributes[ATTR_COLOR_TEMP]
+                    )
+                )
+            else:
+                hue, saturation = None, None
             if isinstance(hue, (int, float)) and isinstance(saturation, (int, float)):
                 hue = round(hue, 0)
                 saturation = round(saturation, 0)
diff --git a/tests/components/homekit/test_type_lights.py b/tests/components/homekit/test_type_lights.py
index 20029861adb..e82bc5bb15d 100644
--- a/tests/components/homekit/test_type_lights.py
+++ b/tests/components/homekit/test_type_lights.py
@@ -293,9 +293,25 @@ async def test_light_color_temperature_and_rgb_color(hass, hk_driver, cls, event
     )
     await hass.async_block_till_done()
     acc = cls.light(hass, hk_driver, "Light", entity_id, 2, None)
+    assert acc.char_hue.value == 260
+    assert acc.char_saturation.value == 90
 
     assert not hasattr(acc, "char_color_temperature")
 
+    hass.states.async_set(entity_id, STATE_ON, {ATTR_COLOR_TEMP: 224})
+    await hass.async_block_till_done()
+    await acc.run_handler()
+    await hass.async_block_till_done()
+    assert acc.char_hue.value == 27
+    assert acc.char_saturation.value == 27
+
+    hass.states.async_set(entity_id, STATE_ON, {ATTR_COLOR_TEMP: 352})
+    await hass.async_block_till_done()
+    await acc.run_handler()
+    await hass.async_block_till_done()
+    assert acc.char_hue.value == 28
+    assert acc.char_saturation.value == 61
+
 
 async def test_light_rgb_color(hass, hk_driver, cls, events):
     """Test light with rgb_color."""