diff --git a/homeassistant/components/rfxtrx/light.py b/homeassistant/components/rfxtrx/light.py
index 7212b65cd7e..58e7d4673c8 100644
--- a/homeassistant/components/rfxtrx/light.py
+++ b/homeassistant/components/rfxtrx/light.py
@@ -7,7 +7,7 @@ import RFXtrx as rfxtrxmod
 
 from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
-    SUPPORT_BRIGHTNESS,
+    COLOR_MODE_BRIGHTNESS,
     LightEntity,
 )
 from homeassistant.config_entries import ConfigEntry
@@ -20,8 +20,6 @@ from .const import COMMAND_OFF_LIST, COMMAND_ON_LIST
 
 _LOGGER = logging.getLogger(__name__)
 
-SUPPORT_RFXTRX = SUPPORT_BRIGHTNESS
-
 
 def supported(event: rfxtrxmod.RFXtrxEvent):
     """Return whether an event supports light."""
@@ -60,6 +58,8 @@ async def async_setup_entry(
 class RfxtrxLight(RfxtrxCommandEntity, LightEntity):
     """Representation of a RFXtrx light."""
 
+    _attr_color_mode = COLOR_MODE_BRIGHTNESS
+    _attr_supported_color_modes = {COLOR_MODE_BRIGHTNESS}
     _brightness = 0
     _device: rfxtrxmod.LightingDevice
 
@@ -78,11 +78,6 @@ class RfxtrxLight(RfxtrxCommandEntity, LightEntity):
         """Return the brightness of this light between 0..255."""
         return self._brightness
 
-    @property
-    def supported_features(self):
-        """Flag supported features."""
-        return SUPPORT_RFXTRX
-
     @property
     def is_on(self):
         """Return true if device is on."""