Styling individual letters in word

I' currently trying to Style the word "Siteripe". I'd like each letter to have a different color. As shown on this page I'm able to style just the first letter with the lines of CSS code below

#namer:first-letter {
  color:#09C;
  font-size:1.1em;
  font-weight:bold;
}

Since there eight(8) letters in the word, how do I style the remaining seven? I did try the styling bellow but it didn't work. Is there a way to Style the letters individually without wrapping each letter using spans.

   #namer:(1)-letter {
      color:#09C;
      font-size:1.1em;
      font-weight:bold;
    }