diff --git a/homeassistant/components/hue/v2/light.py b/homeassistant/components/hue/v2/light.py
index 348d60d8de2..32a9832f69b 100644
--- a/homeassistant/components/hue/v2/light.py
+++ b/homeassistant/components/hue/v2/light.py
@@ -94,6 +94,9 @@ class HueLight(HueBaseEntity, LightEntity):
                 self._supported_color_modes.add(ColorMode.BRIGHTNESS)
             # support transition if brightness control
             self._attr_supported_features |= LightEntityFeature.TRANSITION
+        if len(self._supported_color_modes) == 0:
+            # only add onoff colormode as fallback
+            self._supported_color_modes.add(ColorMode.ONOFF)
         self._last_brightness: float | None = None
         self._color_temp_active: bool = False
         # get list of supported effects (combine effects and timed_effects)
diff --git a/tests/components/hue/test_light_v2.py b/tests/components/hue/test_light_v2.py
index 55b0c194781..0c79933a246 100644
--- a/tests/components/hue/test_light_v2.py
+++ b/tests/components/hue/test_light_v2.py
@@ -72,7 +72,7 @@ async def test_lights(
     assert light_4.attributes["friendly_name"] == "Hue on/off light"
     assert light_4.state == "off"
     assert light_4.attributes["mode"] == "normal"
-    assert light_4.attributes["supported_color_modes"] == []
+    assert light_4.attributes["supported_color_modes"] == [ColorMode.ONOFF]
 
 
 async def test_light_turn_on_service(