是否有任何干净的CSS方法可以使单词中的每个字母都有不同的颜色？

I need a way to allow each letter of a word to rotate through 3 different colors. I know of some not so clean ways I can do this with asp.NET, but I'm wondering if there might be a cleaner CSS/JavaScript solution that is more search engine friendly.I need a way to allow each letter of a word to