When a colonist is sleeping or otherwise unconscious, the mood bar stays in place, and any risk of a mental break is paused. For example, when a Hungry colonist (-6 mood) eats a meal, you'll see the mood target immediately jump to the right as the Hungry effect disappears, but the mood bar takes some time to inch its way toward the triangle. The Mood bar moves towards the Mood Target indicator at a maximum rate of +12 per in-game hour when mood is increasing or −8 per in-game hour when decreasing.
Pawns have a base mood of 32 and the baseline is affected by the Colonist Mood AI storyteller setting - note that the default difficulty options also change this setting.
A 'Mood Target', shown as a white triangle below the mood bar, is a representation of all the positive and negative thoughts held by a colonist and changes instantly depending on the colonists exact situation, while 'Mood' is a blue bar that represents a colonist's mood in that exact moment.
Colonists have a 'Mood (%)' and a 'Mood Target', shown in the Needs tab.
