diffrent hex color code for every letter. you can get a program that can do it for you, its much easier and faster to use a program useally. magos model editor comes with it as a add on.
ex: |c00FF0000M|c00FF1500a|c00FF2B00d|c00FF4000c|c00FF5500a|c00FF6B00t|c00FF80002|r
thats madcat2 in different colors, see how every letter has a different hex code on it, thats why i think it personally easier to have a program do it.