(this will make the message Welcome To The Server with each letter being a different color)
Next commandblock place it beside the one you just placed (making sure it's further away than the last one from the start of the clock) and add this to it.
/scoreboard players set @a[score_isOffline_min=1] Offline 0
And thats it, if you've done it right, it will look something like this and will work perfectly fine.
If you want to make your own text for it a really useful website is http://ezekielelin.com/tellraw/ it will allow you to make titles and add your own colors, just make sure you add the title @a[score_isOffline_min=1] to the begining or it won't work how you want it.
Rollback Post to RevisionRollBack
Click the dragon/egg that is on top to help me raise my dragons