[fix] color uniformity

(cherry picked from commit 150f920430b01b09c0b0379995dc6d782db4122a)

Author: glemestre

java/common/src/main/res/values/colors.xml

@@ -5,7 +5,7 @@
   -->
 
 <resources>
-    <color name="colorPrimary">#009FE3</color>
-    <color name="colorPrimaryDark">#008DC9</color>
+    <color name="colorPrimary">#448aff</color>
+    <color name="colorPrimaryDark">#3f51b5</color>
     <color name="colorAccent">@android:color/white</color>
 </resources>