diff --git a/homeassistant/components/homematic/const.py b/homeassistant/components/homematic/const.py
index cd2d528044a9..188ec1e2445f 100644
--- a/homeassistant/components/homematic/const.py
+++ b/homeassistant/components/homematic/const.py
@@ -63,6 +63,7 @@ HM_DEVICE_TYPES = {
         "IPDimmer",
         "ColorEffectLight",
         "IPKeySwitchLevel",
+        "ColdWarmDimmer",
     ],
     DISCOVER_SENSORS: [
         "SwitchPowermeter",
diff --git a/homeassistant/components/homematic/light.py b/homeassistant/components/homematic/light.py
index 52b2f9a79968..6e6ccb78371c 100644
--- a/homeassistant/components/homematic/light.py
+++ b/homeassistant/components/homematic/light.py
@@ -3,11 +3,13 @@ import logging
 
 from homeassistant.components.light import (
     ATTR_BRIGHTNESS,
+    ATTR_COLOR_TEMP,
     ATTR_EFFECT,
     ATTR_HS_COLOR,
     ATTR_TRANSITION,
     SUPPORT_BRIGHTNESS,
     SUPPORT_COLOR,
+    SUPPORT_COLOR_TEMP,
     SUPPORT_EFFECT,
     Light,
 )
@@ -60,6 +62,8 @@ class HMLight(HMDevice, Light):
             features |= SUPPORT_COLOR
         if "PROGRAM" in self._hmdevice.WRITENODE:
             features |= SUPPORT_EFFECT
+        if hasattr(self._hmdevice, "get_color_temp"):
+            features |= SUPPORT_COLOR_TEMP
         return features
 
     @property
@@ -70,6 +74,14 @@ class HMLight(HMDevice, Light):
         hue, sat = self._hmdevice.get_hs_color(self._channel)
         return hue * 360.0, sat * 100.0
 
+    @property
+    def color_temp(self):
+        """Return the color temp in mireds [int]."""
+        if not self.supported_features & SUPPORT_COLOR_TEMP:
+            return None
+        hm_color_temp = self._hmdevice.get_color_temp(self._channel)
+        return self.max_mireds - (self.max_mireds - self.min_mireds) * hm_color_temp
+
     @property
     def effect_list(self):
         """Return the list of supported effects."""
@@ -92,7 +104,11 @@ class HMLight(HMDevice, Light):
         if ATTR_BRIGHTNESS in kwargs and self._state == "LEVEL":
             percent_bright = float(kwargs[ATTR_BRIGHTNESS]) / 255
             self._hmdevice.set_level(percent_bright, self._channel)
-        elif ATTR_HS_COLOR not in kwargs and ATTR_EFFECT not in kwargs:
+        elif (
+            ATTR_HS_COLOR not in kwargs
+            and ATTR_COLOR_TEMP not in kwargs
+            and ATTR_EFFECT not in kwargs
+        ):
             self._hmdevice.on(self._channel)
 
         if ATTR_HS_COLOR in kwargs:
@@ -101,6 +117,11 @@ class HMLight(HMDevice, Light):
                 saturation=kwargs[ATTR_HS_COLOR][1] / 100.0,
                 channel=self._channel,
             )
+        if ATTR_COLOR_TEMP in kwargs:
+            hm_temp = (self.max_mireds - kwargs[ATTR_COLOR_TEMP]) / (
+                self.max_mireds - self.min_mireds
+            )
+            self._hmdevice.set_color_temp(hm_temp)
         if ATTR_EFFECT in kwargs:
             self._hmdevice.set_effect(kwargs[ATTR_EFFECT])