diff --git a/bellows/ezsp/__init__.py b/bellows/ezsp/__init__.py
index 1aa308bd..7dd0adfa 100644
--- a/bellows/ezsp/__init__.py
+++ b/bellows/ezsp/__init__.py
@@ -916,3 +916,15 @@ async def xncp_get_tx_power_info(self, country_code: str) -> GetTxPowerInfoRsp:
         """Get maximum and recommended TX power for a country (ISO 3166-1 alpha-2)."""
         code = country_code.upper().encode("ascii")
         return await self.send_xncp_frame(xncp.GetTxPowerInfoReq(country_code=code))
+
+    async def xncp_set_led_state(
+        self, red: t.uint8_t, green: t.uint8_t, blue: t.uint8_t
+    ) -> None:
+        """Set the adapter LED color."""
+        await self.send_xncp_frame(
+            xncp.SetLedStateReq(
+                red=red,
+                green=green,
+                blue=blue,
+            )
+        )
diff --git a/bellows/ezsp/xncp.py b/bellows/ezsp/xncp.py
index 1048e967..9e80a01e 100644
--- a/bellows/ezsp/xncp.py
+++ b/bellows/ezsp/xncp.py
@@ -47,6 +47,7 @@ class XncpCommandId(t.enum16):
     GET_ROUTE_TABLE_ENTRY_REQ = 0x0007
     GET_TX_POWER_INFO_REQ = 0x0008
     SEND_UNICAST_REQ = 0x0009
+    SET_LED_STATE_REQ = 0x0F00
 
     GET_SUPPORTED_FEATURES_RSP = GET_SUPPORTED_FEATURES_REQ | 0x8000
     SET_SOURCE_ROUTE_RSP = SET_SOURCE_ROUTE_REQ | 0x8000
@@ -58,6 +59,7 @@ class XncpCommandId(t.enum16):
     GET_ROUTE_TABLE_ENTRY_RSP = GET_ROUTE_TABLE_ENTRY_REQ | 0x8000
     GET_TX_POWER_INFO_RSP = GET_TX_POWER_INFO_REQ | 0x8000
     SEND_UNICAST_RSP = SEND_UNICAST_REQ | 0x8000
+    SET_LED_STATE_RSP = SET_LED_STATE_REQ | 0x8000
 
     UNKNOWN = 0xFFFF
 
@@ -153,6 +155,9 @@ class FirmwareFeatures(t.bitmap32):
     # single command
     COMBINED_SEND = 1 << 8
 
+    # The firmware exposes adapter LED control
+    LED_CONTROL = 1 << 31
+
 
 class XncpCommandPayload(t.Struct):
     pass
@@ -300,6 +305,18 @@ class SendUnicastRsp(XncpCommandPayload):
     sequence: t.uint8_t
 
 
+@register_command(XncpCommandId.SET_LED_STATE_REQ)
+class SetLedStateReq(XncpCommandPayload):
+    red: t.uint8_t
+    green: t.uint8_t
+    blue: t.uint8_t
+
+
+@register_command(XncpCommandId.SET_LED_STATE_RSP)
+class SetLedStateRsp(XncpCommandPayload):
+    pass
+
+
 @register_command(XncpCommandId.UNKNOWN)
 class Unknown(XncpCommandPayload):
     pass
diff --git a/tests/test_xncp.py b/tests/test_xncp.py
index 451f5e8e..f9bd09d7 100644
--- a/tests/test_xncp.py
+++ b/tests/test_xncp.py
@@ -348,3 +348,23 @@ async def test_xncp_get_tx_power_info(ezsp_f: EZSP) -> None:
             ).serialize()
         )
     ]
+
+
+async def test_xncp_set_led_state(ezsp_f: EZSP) -> None:
+    """Test XNCP set_led_state."""
+    ezsp_f._mock_commands["customFrame"] = customFrame = AsyncMock(
+        return_value=[
+            t.EmberStatus.SUCCESS,
+            xncp.XncpCommand.from_payload(xncp.SetLedStateRsp()).serialize(),
+        ]
+    )
+
+    await ezsp_f.xncp_set_led_state(red=1, green=2, blue=3)
+
+    assert customFrame.mock_calls == [
+        call(
+            xncp.XncpCommand.from_payload(
+                xncp.SetLedStateReq(red=1, green=2, blue=3)
+            ).serialize()
+        )
+    ]