Sleep score circle

[Wyrsek]

What are the two different colors in this circle? I can't find anything in the app that explains this. 

Looking at the more aggregate sleep values, I assumed that there's a connection between deep, rem, light values and the two color circle around the score but I'd really like to know what exactly this circle is trying to tell me.

[LZeeW · Accepted solution]

Hello @Wyrsek and welcome to the Community.  You see something like this when you exceed your goal.  I set my sleep goal to seven hours.  Recently, I didn't meet that goal.  The circle isn't complete and there is no check mark in that open area.  A few days ago, I slept for over nine hours and the darker part goes a third of the way around and it has the check mark.  This happens with every metric where you set a goal: steps, distance, active zone minutes, etc.