Quest Messages

Do the different "types" of quest messages actually do anything? (hint, secret, warning, etc.)

I searched the forum and couldnt find anything so if this is asked alot im sry :O

The only quest types there are, are undiscovered required quest
discovered required quest, undiscovered optional quest and discovered optional quest.

If a quest message contains things like 'warning' this is just because 'warning' is included in the text message.

By the way:
You can use a special code (I don't know it by heart) to change the color of a text message.