diff -r a323578ea954 -r 9d968fbcaa2a client/annotviz/app/js/utils.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/annotviz/app/js/utils.js	Tue Jan 20 12:00:40 2015 +0100
@@ -0,0 +1,17 @@
+/**
+* js/utils.js
+*
+* basic tools
+*
+*/
+
+'use strict';
+
+function rgb2hex (r, g, b) {
+	return "0x"
+		 + ("0" + parseInt(r, 10).toString(16)).slice(-2)
+		 + ("0" + parseInt(g, 10).toString(16)).slice(-2)
+		 + ("0" + parseInt(b, 10).toString(16)).slice(-2);
+};
+
+module.exports = rgb2hex;
\ No newline at end of file