diff --git a/homeassistant/components/calendar/__init__.py b/homeassistant/components/calendar/__init__.py
index 6c34c8bf540..066235b9f50 100644
--- a/homeassistant/components/calendar/__init__.py
+++ b/homeassistant/components/calendar/__init__.py
@@ -506,6 +506,8 @@ def is_offset_reached(
 class CalendarEntityDescription(EntityDescription, frozen_or_thawed=True):
     """A class that describes calendar entities."""
 
+    initial_color: str | None = None
+
 
 class CalendarEntity(Entity):
     """Base class for calendar event entities."""
@@ -516,12 +518,16 @@ class CalendarEntity(Entity):
 
     _alarm_unsubs: list[CALLBACK_TYPE] | None = None
 
-    _attr_initial_color: str | None = None
+    _attr_initial_color: str | None
 
     @property
     def initial_color(self) -> str | None:
         """Return the initial color for the calendar entity."""
-        return self._attr_initial_color
+        if hasattr(self, "_attr_initial_color"):
+            return self._attr_initial_color
+        if hasattr(self, "entity_description"):
+            return self.entity_description.initial_color
+        return None
 
     def get_initial_entity_options(self) -> er.EntityOptionsType | None:
         """Return initial entity options."""
diff --git a/homeassistant/components/google/calendar.py b/homeassistant/components/google/calendar.py
index e9d5b41fef3..35b612cdc24 100644
--- a/homeassistant/components/google/calendar.py
+++ b/homeassistant/components/google/calendar.py
@@ -101,7 +101,6 @@ class GoogleCalendarEntityDescription(CalendarEntityDescription):
     search: str | None
     local_sync: bool
     device_id: str
-    initial_color: str | None = None
     event_type: EventTypeEnum | None = None
 
 
@@ -361,7 +360,6 @@ class GoogleCalendarEntity(
         if entity_description.entity_id:
             self.entity_id = entity_description.entity_id
         self._attr_unique_id = unique_id
-        self._attr_initial_color = entity_description.initial_color
         if not entity_description.read_only:
             self._attr_supported_features = (
                 CalendarEntityFeature.CREATE_EVENT | CalendarEntityFeature.DELETE_EVENT
diff --git a/tests/components/calendar/conftest.py b/tests/components/calendar/conftest.py
index 2382f37783e..2b6dad0faca 100644
--- a/tests/components/calendar/conftest.py
+++ b/tests/components/calendar/conftest.py
@@ -8,7 +8,12 @@ from unittest.mock import AsyncMock
 
 import pytest
 
-from homeassistant.components.calendar import DOMAIN, CalendarEntity, CalendarEvent
+from homeassistant.components.calendar import (
+    DOMAIN,
+    CalendarEntity,
+    CalendarEntityDescription,
+    CalendarEvent,
+)
 from homeassistant.config_entries import ConfigEntry, ConfigFlow
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
@@ -54,8 +59,11 @@ class MockCalendarEntity(CalendarEntity):
         """Initialize entity."""
         self._attr_name = name.capitalize()
         self._events = events or []
-        self._attr_initial_color = initial_color
         self._attr_unique_id = unique_id
+        self.entity_description = CalendarEntityDescription(
+            key=unique_id or name,
+            initial_color=initial_color,
+        )
 
     @property
     def event(self) -> CalendarEvent | None:
diff --git a/tests/components/calendar/test_init.py b/tests/components/calendar/test_init.py
index 67eca34728e..3f13cffb809 100644
--- a/tests/components/calendar/test_init.py
+++ b/tests/components/calendar/test_init.py
@@ -13,10 +13,16 @@ import pytest
 from syrupy.assertion import SnapshotAssertion
 import voluptuous as vol
 
-from homeassistant.components.calendar import DOMAIN, SERVICE_GET_EVENTS
+from homeassistant.components.calendar import (
+    DOMAIN,
+    SERVICE_GET_EVENTS,
+    CalendarEntity,
+    CalendarEntityDescription,
+)
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError, ServiceNotSupported
 from homeassistant.helpers import entity_registry as er
+from homeassistant.helpers.typing import UNDEFINED
 from homeassistant.setup import async_setup_component
 from homeassistant.util import dt as dt_util
 
@@ -657,3 +663,56 @@ async def test_calendar_initial_color_none(
     # Entities 1 and 2 were created without an initial_color
     entity = test_entities[0]
     assert entity.get_initial_entity_options() is None
+
+
+@pytest.mark.parametrize(
+    ("description_color", "attr_color", "expected_color"),
+    [
+        # no description and no attr_initial_color
+        (UNDEFINED, UNDEFINED, None),
+        # no description and attr_initial_color "A"
+        (UNDEFINED, "#AAAAAA", "#AAAAAA"),
+        # no description and attr_initial_color None
+        (UNDEFINED, None, None),
+        # description setting the color "B", and no attr_initial_color
+        ("#BBBBBB", UNDEFINED, "#BBBBBB"),
+        # description setting the color "B", but overridden by attr_initial_color "A"
+        ("#BBBBBB", "#AAAAAA", "#AAAAAA"),
+        # description setting the color "B", but overridden by attr_initial_color None
+        ("#BBBBBB", None, None),
+    ],
+)
+async def test_calendar_initial_color_precedence(
+    description_color: str | None | object,
+    attr_color: str | None | object,
+    expected_color: str | None,
+) -> None:
+    """Test that _attr_initial_color takes precedence over entity_description."""
+
+    class TestCalendarEntity(CalendarEntity):
+        """Test entity for initial_color precedence tests."""
+
+        _attr_has_entity_name = True
+
+        def __init__(
+            self,
+            description_color: str | None | object,
+            attr_color: str | None | object,
+        ) -> None:
+            """Initialize entity."""
+            self._attr_name = "Test"
+            self._attr_unique_id = "test_precedence"
+
+            # Only set entity_description if description_color is not UNDEFINED
+            if description_color is not UNDEFINED:
+                self.entity_description = CalendarEntityDescription(
+                    key="test",
+                    initial_color=description_color,
+                )
+
+            # Only set _attr_initial_color if attr_color is not UNDEFINED
+            if attr_color is not UNDEFINED:
+                self._attr_initial_color = attr_color
+
+    entity = TestCalendarEntity(description_color, attr_color)
+    assert entity.initial_color == expected_color