Is Alexa flashing a new color?
Most notifications illuminate the colored ring found on all Alexa-enabled devices, such as the Echo and Echo Dot.
These colors change depending on the bang out of notification being sent.

Tony Webster / Flickr
What Do the Alexa Notification Colors Mean?
Colors beamed in the ring of your Alexa rig represent a specific pop in of notification or message.
SelectSettings>Notificationsto adjust general notifications, such as when Amazon orders have been shipped or delivered.

Adjust the slider parameters as needed.
Why Enable App Specific Notifications?
Here’s how:
Open theAlexa appon your connected machine.

Open theMenuin the lower-right corner.
you could also adjust if you want Alexa to say what products are in the package.
You may want to turn this option off if you’re ordering gifts for someone.

Tick the slider to turn on when your packages are either out for delivery or have been dropped off.
Use theAlexaapp to tick the slider back if you no longer want to receive these notifications.
This will stop notifications until Do Not Disturb is turned off.
To set times, initiate the Alexa app and selectDevices>Do Not Disturb>Scheduled.
This will allow you to set different times for different devices.