You cannot directly change the title colour sorry, but there are ways :
Certain Staff Thread Titles are Orange. Obviously staff only (just explaining why you see it).
You'll see plenty of Blue Titles about. These are made by Elite Members.
There are two ways to become an Elite member and enable blue titles :
1) Through perseverance, plenty of posting & likes (SEE HERE).
2) Temporarily by becoming our 'Featured Crew' (SEE HERE). The Evil Clowns have been noticed for this, but so have others. Put up a good clean fight and you never know....