text color?

[outcast]

i am messing around with the onscreendisplay , what i wanted to know , is there a way to change the text color and size?

OnScreenDisplay "hello"
4.5
OnScreenDisplay "welcome"
5
OnScreenDisplay "guest"
4.5


this is the kinda code i have so far! just wanted to know how or where to change the size and color!?

thanks!!!