diff --git a/package-lock.json b/package-lock.json
index c2f8bdb..b49d5b6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,8 +1,42 @@
 {
   "name": "homecontrol-control-base",
-  "version": "1.1.0",
-  "lockfileVersion": 1,
+  "version": "1.3.0",
+  "lockfileVersion": 2,
   "requires": true,
+  "packages": {
+    "": {
+      "version": "1.3.0",
+      "license": "UNLICENSED",
+      "dependencies": {
+        "merge-options": "^1.0.1",
+        "node-object-hash": "^1.4.1"
+      }
+    },
+    "node_modules/is-plain-obj": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/is-plain-obj/-/is-plain-obj-1.1.0.tgz",
+      "integrity": "sha1-caUMhCnfync8kqOQpKA7OfzVHT4=",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/merge-options": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/merge-options/-/merge-options-1.0.1.tgz",
+      "integrity": "sha512-iuPV41VWKWBIOpBsjoxjDZw8/GbSfZ2mk7N1453bwMrfzdrIk7EzBd+8UVR6rkw67th7xnk9Dytl3J+lHPdxvg==",
+      "dependencies": {
+        "is-plain-obj": "^1.1"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/node-object-hash": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/node-object-hash/-/node-object-hash-1.4.1.tgz",
+      "integrity": "sha512-JQVqSM5/mOaUoUhCYR0t1vgm8RFo7qpJtPvnoFCLeqQh1xrfmr3BCD3nGBnACzpIEF7F7EVgqGD3O4lao/BY/A=="
+    }
+  },
   "dependencies": {
     "is-plain-obj": {
       "version": "1.1.0",
diff --git a/package.json b/package.json
index f1f2790..57730b5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "homecontrol-control-base",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Base class which all hc-controls inherit from",
   "main": "index.js",
   "scripts": {
diff --git a/utils.js b/utils.js
index dc4ab64..b355951 100644
--- a/utils.js
+++ b/utils.js
@@ -11,6 +11,15 @@ function clamp(value, min, max) {
 	return Math.min(max, Math.max(min, value));
 }
 
+function hue2rgb(p, q, t) {
+	if (t < 0) t += 1;
+	if (t > 1) t -= 1;
+	if (t < 1/6) return p + (q - p) * 6 * t;
+	if (t < 1/2) return q;
+	if (t < 2/3) return p + (q - p) * (2/3 - t) * 6;
+	return p;
+}
+
 function HSL_to_RGB(hsl) {
 	let h = hsl.hue / 360;
 	let s = hsl.sat / 100;
@@ -41,12 +50,17 @@ function RGB_to_HSL(rgb) {
 	let g = rgb.green / 255;
 	let b = rgb.blue / 255;
 
-	let max = Math.max(r, g, b), min = Math.min(r, g, b);
+	let max = Math.max(r, g, b);
+	let min = Math.min(r, g, b);
+
+	let h = 0;
+	let s = 0;
 
 	if (max == min || max - min < 0.01) {
-		h = s = 0; // achromatic
+		h = 0; // achromatic
+		s = 0;
 	} else {
-		var d = max - min;
+		let d = max - min;
 		s = d / (2 - max - min);
 
 		switch (max) {
@@ -78,5 +92,6 @@ module.exports = {
     clamp,
     HSL_to_RGB,
     RGB_to_HSL,
+	hue2rgb,
 	asyncTimeout,
 };
\ No newline at end of file