It is useful to be able to customize the LED notifications on your device ginger76261. In this case the settings would need to be changed directly from the app that is giving you a notification, since the system does not have a specific setting to make these type of changes on the device.
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Oreo removed the ability to customize all notifications. This has been, and is, a source of major irritation for S7, 8, and 9 users. Despite all the objections, it doesn't appear that it will returned.