Here's your awnser.
In events have this: onActivate->Client->centerprint
Type <color:FFFFFF>(white) in the box for a white color then type your message.
Fonts are the same way
<font:(text):(scale#)>
Font goes before color.
Notes:You can use any input event you want.
I suggest that you get the /gethex addon, as the colors are in hex form.
That's all you need to know for ingame text.
5secafterpostEDIT IDK if there is a mod, /gethex just tellsyou what the hex of the paint color you have is :P