Add this before it: <color:FFFF00>, or you can change the FFFF00 to any color code. FFFF00 = yellow.
so the event would look like this OnActivate>Client>CenterPrint> <color:FFFFF> *words*
Heres something to think about. When using colored fonts, the six numbers represent RGB. The first 2 are red, next 2 green, and last 2 blue. Thats a code to use.