Manual

Quest Difficulty
All quests in your quest log are color coded for their relative difficulty level.
The color of the quest name in your quest list tells you whether the quest
is easy or hard for a character of your current level, and how much
experience you can expect to earn from completing that quest.
The different colors in order from least difficult to most difficult are gray,
green, yellow, orange, and red. Gray quests are for characters much lower
in level than you, so they are very easy to complete and give little or no
experience. Green quests are lower in level than your character is, and they
are thus easy to complete on your own. They also give a fair amount of
experience. Yellow quests are appropriate for a character of your level. They
are more challenging than green quests, and thus give a commensurately
greater experience reward. Orange quests are for characters several levels
higher than yours, and should not be attempted alone. They carry a high
experience reward, but are difficult to complete. Red quests are for
characters many levels higher than you, and usually spell certain death for
you if you attempt them by yourself. To complete orange and red quests,
you should group with other players.
Completing a Quest
In each quest entry in your quest log, you will be told the objectives for
completing the quest. Quests that ask you to collect items or kill monsters
almost always require you to return to the NPC who gave you the quest to
actually complete it. Quests that ask you to deliver a message or item end
when you find the required NPC. All quests that give you a material reward
usually require you to finish the quest by speaking to a non-player character
so you can receive your reward.
WHERE TO TURN IN QUESTS
An easy way to tell whom you should return to in order to finish a quest is
to look for a yellow question mark. When you have fulfilled all the
objectives for a quest and return to an NPC to turn it in, that NPC will have
a yellow question mark over its head. However, if the NPC has a gray
question mark, then that means you haven't yet fulfilled all objectives. Only
after you have completed all objectives will the question mark turn yellow,
indicating that you can return to the NPC to finish the quest.
112