If you get on your Samsung Galaxy S 6 a WhatsApp message, then you can see it next to a notification sound and on the LED notification. The LED of the Samsung Galaxy S 6 remains lit in a white color. This light color for WhatsApp messages can be changed on the Samsung Galaxy S 6. So you can set for example, that the LED light on WhatsApp messages always glows green. So you know immediately at hand of light, what kind of message on the Samsung Galaxy S6 is received.
So you can get on the Samsung Galaxy S6 change the Lichtfrabe the notification LED for incoming WhatsApp messages.
Navigate from the home screen: Menu -> WhatsApp
If WhatsApp is open, type it in the message list on the three-point icon in the top right. A pop-up opens, must be selected in the now "Settings". Navigates now on "Notifications". In the section "Notifications" You can now find the entry "light". Tap on it and you can choose from seven different colors of light color, which is to shine upon receipt of WhatsApp messages on the Samsung Galaxy S 6.
Have you chosen a color notification LED Samsung Galaxy S6 upon receipt of a WhatsApp message will shine in this one.