Your alexa can display any one of these 7 colors for these different reasons pulsing yellow light:
57+ Echo Dot Yellow Ring
Background. When your echo dot flashes yellow, it just means you have a message waiting. When i first turned on my echo dot, i didn't know how to turn off the annoying ring colors that glow and turn on/off.
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The pulsing yellow light indicates that there is a message or a notification waiting for you. Echo dot one ring acoustic stand. You can say, play my messages or check my notifications for more.
To get rid of it, just listen to your messages by saying, alexa, play my messages, alexa, read.
However, some echo dot users have reported strange yellow flashes and green lights on their echo dot device. The echo dot has a feature called echo spatial perception (esp). The top of the echo dot has four buttons, four microphones and an led ring. When you're away, simply use your smartphone.