This app enables Samsungs native edge lighting notifications for any installed app on your phone.
Paid app link removed.
You just need to read instructions carefully and it works with latest android. App is using original edge lighting settings in your phone, so you can use any built-in effect, color and you can fully customize your edge lighting using system settings. App is just "wrapper" around sasmung native notifications.
Here is original how-to:
Because of recent Samsungs changes, there are more steps required to make this application function again. First, enable all the applications that you want to use with edge lighting in this application. After that, go to Settings / Display / Edge Screen / Edge Lighting / Edge lighting style / Color / Custom color and go into section By text. Here you input all the application names, which you've enabled in this application and select colors for them. After that, it will work because this app will trigger a new notification with application title and it will trigger original edge ligthing effect.
And if you are unsure, you can watch this video tutorial, how to set the app.