Unit listing changes color when assigned to a raid

[DerTroof]

Playing ED full campaign as LW. I have noticed during Planning Phase that sometimes when a bomber unit is assigned to a raid the text listing that unit changes to red or yellow. What do these mean?

Also, noticed some units are listed in blue shaded text rather than the normal white. Same question. (Or... are they NJ units?)

[simovitch]

Bombers can fly 2 raids a day so during the planning phase if you see blue bombing groups listed it means they have been assigned a morning (or late afternoon) mission and it's late (or early) enough in the day to refuel, rearm and fly another mission. Once you select them they turn red, meaning that they cant be selected again that day. Yellow just means they have been selected and they have no other later or earlier missions planned.

[DerTroof]

Thanks, appreciate the prompt response.