Router to Orbi signal

Hi, I have setup the router to AP mode and connected to my R7000. Everything works fine as both the Orbi router and satellite are connected with LED off. I login to the satellite. Go to Status and found a signal diagram says 'Your Orbi Satellite connection is up and running'. However the signal between the router and the Orbi satellite is half blue and half grey. Wondering is the signal is not strong enough or not. What can I do with it to get it all blue (got that once)? I have updated both to the latest firmware.TIA.

See the attached picture.