When i do a quest, how do i put "Main Mission" on description?

[Glevion]

I want to put Main Mission (on yellow, the typical campaign message) when my game starts but it doesn't show it, it only shows a normal white description. I want to put "Main mission" (Yellow) and then some description.

This

 

[blacksheepwalll]

|C00FFFF00Main Mission|R

 

[Arad MNK]

Use This.