With nLight you can easily assign a color to a text that appearsin your notification. For example you can assign red color to thename of your girlfriend or boyfriend and the LED will blink redevery time the name is found in the notification, regardless of theapplication that posted the notification.
Warning: nLight doesn't work with Android 5.0, however it worksperfectly with Android 5.1 and higher and Android 4.4.