diff --git a/homeassistant/components/fritzbox/coordinator.py b/homeassistant/components/fritzbox/coordinator.py
index 52fa3ba1a12b5..a6a30ffdc6aff 100644
--- a/homeassistant/components/fritzbox/coordinator.py
+++ b/homeassistant/components/fritzbox/coordinator.py
@@ -27,6 +27,7 @@ class FritzboxCoordinatorData:
 
     devices: dict[str, FritzhomeDevice]
     templates: dict[str, FritzhomeTemplate]
+    supported_color_properties: dict[str, tuple[dict, list]]
 
 
 class FritzboxDataUpdateCoordinator(DataUpdateCoordinator[FritzboxCoordinatorData]):
@@ -49,7 +50,7 @@ def __init__(self, hass: HomeAssistant, name: str) -> None:
         self.new_devices: set[str] = set()
         self.new_templates: set[str] = set()
 
-        self.data = FritzboxCoordinatorData({}, {})
+        self.data = FritzboxCoordinatorData({}, {}, {})
 
     async def async_setup(self) -> None:
         """Set up the coordinator."""
@@ -120,6 +121,7 @@ def _update_fritz_devices(self) -> FritzboxCoordinatorData:
 
         devices = self.fritz.get_devices()
         device_data = {}
+        supported_color_properties = self.data.supported_color_properties
         for device in devices:
             # assume device as unavailable, see #55799
             if (
@@ -136,6 +138,13 @@ def _update_fritz_devices(self) -> FritzboxCoordinatorData:
 
             device_data[device.ain] = device
 
+            # pre-load supported colors and color temps for new devices
+            if device.has_color and device.ain not in supported_color_properties:
+                supported_color_properties[device.ain] = (
+                    device.get_colors(),
+                    device.get_color_temps(),
+                )
+
         template_data = {}
         if self.has_templates:
             templates = self.fritz.get_templates()
@@ -145,7 +154,11 @@ def _update_fritz_devices(self) -> FritzboxCoordinatorData:
         self.new_devices = device_data.keys() - self.data.devices.keys()
         self.new_templates = template_data.keys() - self.data.templates.keys()
 
-        return FritzboxCoordinatorData(devices=device_data, templates=template_data)
+        return FritzboxCoordinatorData(
+            devices=device_data,
+            templates=template_data,
+            supported_color_properties=supported_color_properties,
+        )
 
     async def _async_update_data(self) -> FritzboxCoordinatorData:
         """Fetch all device data."""
diff --git a/homeassistant/components/fritzbox/light.py b/homeassistant/components/fritzbox/light.py
index d347f6898c027..36cb7dc8cff04 100644
--- a/homeassistant/components/fritzbox/light.py
+++ b/homeassistant/components/fritzbox/light.py
@@ -57,7 +57,6 @@ def __init__(
     ) -> None:
         """Initialize the FritzboxLight entity."""
         super().__init__(coordinator, ain, None)
-        self._supported_hs: dict[int, list[int]] = {}
 
         self._attr_supported_color_modes = {ColorMode.ONOFF}
         if self.data.has_color:
@@ -65,6 +64,26 @@ def __init__(
         elif self.data.has_level:
             self._attr_supported_color_modes = {ColorMode.BRIGHTNESS}
 
+        (supported_colors, supported_color_temps) = (
+            coordinator.data.supported_color_properties.get(self.data.ain, ({}, []))
+        )
+
+        # Fritz!DECT 500 only supports 12 values for hue, with 3 saturations each.
+        # Map supported colors to dict {hue: [sat1, sat2, sat3]} for easier lookup
+        self._supported_hs: dict[int, list[int]] = {}
+        for values in supported_colors.values():
+            hue = int(values[0][0])
+            self._supported_hs[hue] = [
+                int(values[0][1]),
+                int(values[1][1]),
+                int(values[2][1]),
+            ]
+
+        if supported_color_temps:
+            # only available for color bulbs
+            self._attr_max_color_temp_kelvin = int(max(supported_color_temps))
+            self._attr_min_color_temp_kelvin = int(min(supported_color_temps))
+
     @property
     def is_on(self) -> bool:
         """If the light is currently on or off."""
@@ -148,30 +167,3 @@ async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn the light off."""
         await self.hass.async_add_executor_job(self.data.set_state_off)
         await self.coordinator.async_refresh()
-
-    async def async_added_to_hass(self) -> None:
-        """Get light attributes from device after entity is added to hass."""
-        await super().async_added_to_hass()
-
-        def _get_color_data() -> tuple[dict, list]:
-            return (self.data.get_colors(), self.data.get_color_temps())
-
-        (
-            supported_colors,
-            supported_color_temps,
-        ) = await self.hass.async_add_executor_job(_get_color_data)
-
-        if supported_color_temps:
-            # only available for color bulbs
-            self._attr_max_color_temp_kelvin = int(max(supported_color_temps))
-            self._attr_min_color_temp_kelvin = int(min(supported_color_temps))
-
-        # Fritz!DECT 500 only supports 12 values for hue, with 3 saturations each.
-        # Map supported colors to dict {hue: [sat1, sat2, sat3]} for easier lookup
-        for values in supported_colors.values():
-            hue = int(values[0][0])
-            self._supported_hs[hue] = [
-                int(values[0][1]),
-                int(values[1][1]),
-                int(values[2][1]),
-            ]