Samsung Galaxy S6 Edge has a cool feature called Edge Color Notifications which the edge displays light up with colors to let you know about incoming calls. If you are interested in this color effect feature on your non-Galaxy S6 Edge device, do as follows to get the Galaxy S6 Edge Call Notification on any Android device:
1. Download and install Edge Color Notifications from the Google Play Store
2. Open the app and tap the Settings button
3. There you can change the color of notification, the width, the position of color effect, as well as some other customization
4. You can also specify a color for a specific contact, so the lights turns to that specified color when that person calls. To do so, open the App and tap the Select Contact Specific Color option and tap the Color icon next to the contact you'd like to assign a specific color
** Note that, this edge color notification feature may not seem reasonable for devices without edge displays. But it's kind of fun trying it on your Android device.