diff --git a/homeassistant/components/mqtt/light/schema_basic.py b/homeassistant/components/mqtt/light/schema_basic.py
index 7f2c2cf5e06..fe09667ca4a 100644
--- a/homeassistant/components/mqtt/light/schema_basic.py
+++ b/homeassistant/components/mqtt/light/schema_basic.py
@@ -482,6 +482,13 @@ class MqttLight(MqttEntity, LightEntity, RestoreEntity):
             if self._topic[CONF_BRIGHTNESS_STATE_TOPIC] is None:
                 rgb = convert_color(*color)
                 brightness = max(rgb)
+                if brightness == 0:
+                    _LOGGER.debug(
+                        "Ignoring %s message with zero rgb brightness from '%s'",
+                        color_mode,
+                        msg.topic,
+                    )
+                    return None
                 self._attr_brightness = brightness
                 # Normalize the color to 100% brightness
                 color = tuple(
diff --git a/tests/components/mqtt/test_light.py b/tests/components/mqtt/test_light.py
index ee4f170e8e6..59d5090b711 100644
--- a/tests/components/mqtt/test_light.py
+++ b/tests/components/mqtt/test_light.py
@@ -666,6 +666,12 @@ async def test_brightness_from_rgb_controlling_scale(
     assert state.attributes.get("brightness") == 128
     assert state.attributes.get("rgb_color") == (255, 128, 64)
 
+    # Test zero rgb is ignored
+    async_fire_mqtt_message(hass, "test_scale_rgb/rgb/status", "0,0,0")
+    state = hass.states.get("light.test")
+    assert state.attributes.get("brightness") == 128
+    assert state.attributes.get("rgb_color") == (255, 128, 64)
+
     mqtt_mock.async_publish.reset_mock()
     await common.async_turn_on(hass, "light.test", brightness=191)
     await hass.async_block_till_done()