Fix Hue color state for missing xy (#14230)

homeassistant/components/light/hue.py

@@ -245,7 +245,7 @@ class HueLight(Light):
         mode = self._color_mode
         source = self.light.action if self.is_group else self.light.state
 
-        if mode in ('xy', 'hs'):
+        if mode in ('xy', 'hs') and 'xy' in source:
             return color.color_xy_to_hs(*source['xy'])
 
         return None

tests/components/light/test_hue.py

@@ -650,6 +650,19 @@ def test_hs_color():
 
     assert light.hs_color is None
 
+    light = hue_light.HueLight(
+        light=Mock(state={
+            'colormode': 'hs',
+            'hue': 1234,
+            'sat': 123,
+        }),
+        request_bridge_update=None,
+        bridge=Mock(),
+        is_group=False,
+    )
+
+    assert light.hs_color is None
+
     light = hue_light.HueLight(
         light=Mock(state={
             'colormode': 'xy',