diff --git a/bundles/org.openhab.core.model.script/src/org/openhab/core/model/script/actions/CoreUtil.java b/bundles/org.openhab.core.model.script/src/org/openhab/core/model/script/actions/CoreUtil.java
index 50fb23fed5d..f6fc5eb9416 100644
--- a/bundles/org.openhab.core.model.script/src/org/openhab/core/model/script/actions/CoreUtil.java
+++ b/bundles/org.openhab.core.model.script/src/org/openhab/core/model/script/actions/CoreUtil.java
@@ -70,4 +70,16 @@ public static HSBType xyToHsb(double[] xy, double[] gamutR, double[] gamutG, dou
         Gamut gamut = new Gamut(gamutR, gamutG, gamutB);
         return ColorUtil.xyToHsb(xy, gamut);
     }
+
+    public static double xyToDuv(double[] xy) throws IllegalArgumentException {
+        return ColorUtil.xyToDuv(xy);
+    }
+
+    public static double[] kelvinToXY(double kelvin) throws IndexOutOfBoundsException {
+        return ColorUtil.kelvinToXY(kelvin);
+    }
+
+    public static double xyToKelvin(double[] xy) throws IllegalArgumentException {
+        return ColorUtil.xyToKelvin(xy);
+    }
 }
diff --git a/bundles/org.openhab.core/src/main/java/org/openhab/core/util/ColorUtil.java b/bundles/org.openhab.core/src/main/java/org/openhab/core/util/ColorUtil.java
index d7b1499e3c4..a611ece5767 100644
--- a/bundles/org.openhab.core/src/main/java/org/openhab/core/util/ColorUtil.java
+++ b/bundles/org.openhab.core/src/main/java/org/openhab/core/util/ColorUtil.java
@@ -1202,9 +1202,9 @@ public static double[] kelvinToXY(double kelvin) throws IndexOutOfBoundsExceptio
      * 
      * @param xy an array with the CIE colour XY values to be converted
      * @return the colour temperature in K
-     * @throws IndexOutOfBoundsException if the wrong number of arguments is provided
+     * @throws IllegalArgumentException if the wrong number of arguments is provided
      */
-    public static double xyToKelvin(double[] xy) {
+    public static double xyToKelvin(double[] xy) throws IllegalArgumentException {
         if (xy.length != 2) {
             throw new IllegalArgumentException("xyToKelvin() requires 2 arguments");
         }