Like the guide, but with less reading
A light gray quest is able to be completed, a blue quest is partially completed, a green quest is completed, and a dark gray quest is locked and can't be completed.
Some quests can't be seen until all of its required quests have been completed, while some others can be seen but just not completed.
If multiple people are in the same team using FTB Utilities, they share quest progress.
You can pin quests by clicking the little tack button, which will make it remain on screen while playing.
You can also click the tack button at the bottom right to automatically pin all quests that are unlocked.