§ , just copy paste the symbole and use the normale color code letter/number with the § in front. The symbol and the letter/number will not appear in the book (Example u want §,just do §5(text) it will auto- color code the text u write cause you put the symbol
Also, to see how ur nickname would look like, go on hypixel and go to ur housing, if you do the color code on a sign in ur plot, its going to give u a colored sign with how the color code u did would look like, its what i did