i have done this before and its not bannable, its i would like to say an secret easter egg. To do this you just add this symbol and a number
symbol: ^ (shift+6)
numbers:
^1 = Red
^2 = Green
^3 = Yellow
^4 = Blue
^5 = Light Blue
^6 = Pink
^7 = White
^8 = Grey
^9 = Black