A number of people I work with use the Netgear Orbing Router system.  Overall, I am very pleased with the setup and performance of these units.  Once in a while, you see colored lights coming from the router and like many things these days you just can’t find the documentation that comes with the devices to be able to determine what the lights mean.  Netgear has a great FAQ on this that gets right down to telling you what the lights mean:

Router and satellite power button LEDs

Solid green. Your Orbi router and satellite are powered on.
Solid amber. Your Orbi router and satellite are rebooting.
Pulsing amber. You must reset your Orbi router and satellite to factory default settings.
Pulsing red. Your Orbi system might need attention. Contact support.

Satellite and router ring LEDs

Pulsing white. Your Orbi router and satellite are applying a configuration or updating their firmware.
OFF. Your Orbi router and satellite are working normally.

Router ring LEDs

Solid white. Your Orbi router is powering up.
Pulsing white. Your Orbi router is in factory default mode.
Pulsing magenta. Your Orbi router ring LED might pulse magenta for the following reasons: the WAN port link is down, the router is unable to get the IP address from the modem or ISP, or the router is unable to connect to the Internet.
Pulsing blue and magenta. The Internet connection is blocked because the traffic meter is configured to block Internet traffic when it reaches the limit you configured.

Satellite ring LEDs

Solid white. Your Orbi satellite is powering up.
Pulsing magenta. When your Orbi satellite’s ring LED pulses magenta for the first time, it means that your satellite is attempting to connect to your Orbi router. If the ring LED pulses magenta for more than one minute, it could be for the following reasons: the satellite lost the connection to the router or the satellite is unable to get an IP address from the router.
Solid magenta. Your Orbi satellite ring is solid magenta for 10 seconds if it is unable to obtain the IP address from the router.
Solid blue. If your Orbi satellite ring is solid blue for 10 seconds, the connection between your Orbi router and satellite is good.
Solid amber. If your Orbi satellite ring is solid amber for 10 seconds, the connection between the router and satellite is fair.