you dont need that plugin to put just simple colours into your name.
type /nick in a conversation window, hold ctrl and hit k. A box will then appear, you will then be prompt to choose a colour. Once you have the colour of your choice, and you see the character and the number from the colour, type your nickname after it and hit enter. Voila, you now have a colourful nickname for you and your contacts with plus! to enjoy.
(if you'd like different colours, ctrl+k between each letter)