diff --git a/lib/Drawer/Header.js b/lib/Drawer/Header.js
index a82b624..4b48567 100644
--- a/lib/Drawer/Header.js
+++ b/lib/Drawer/Header.js
@@ -19,12 +19,12 @@ export default class Header extends Component {
 
         if (image) {
             return React.cloneElement(image, {
-                style: Object.assign(styles.header, { height })
+                style: [styles.header, { height: height }]
             }, children);
         }
 
         return (
-            <View style={Object.assign(styles.header, { height, backgroundColor })}>
+            <View style={[styles.header, { height: height, backgroundColor: backgroundColor }]}>
                 {children}
             </View>
         );
diff --git a/lib/Drawer/index.js b/lib/Drawer/index.js
index 453af0d..3583241 100644
--- a/lib/Drawer/index.js
+++ b/lib/Drawer/index.js
@@ -41,7 +41,7 @@ export default class Drawer extends Component {
         })();
 
         return (
-            <ScrollView style={Object.assign(styles.container, { backgroundColor })}>
+            <ScrollView style={[styles.container, { backgroundColor: backgroundColor }]}>
                 {React.Children.map(children, (child) => {
                     return React.cloneElement(child, {
                         theme
diff --git a/lib/helpers.js b/lib/helpers.js
index 33fb8b5..4906df1 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -8,7 +8,7 @@ import { PRIMARY, COLOR } from './config';
  */
 export function getColor(string) {
     if (string) {
-        if (string.contains('#') || string.contains('rgba')) {
+        if (string.indexOf('#') > -1 || string.indexOf('rgba') > -1) {
             return string;
         }