This is how you use html to produce alternate colours in your text:

<font color="red">H</font><font color="FF0099">o</font><font color="0033FF">w </font><font color="006600">a</font><font color="FF6633">b</font><font color="CC99FF">o</font><font color="99CC99">u</font><font color="FFCCFF">t </font><font color="FFCC33">s</font><font color="33FFFF">o</font><font color="FF9999">m</font><font color="9400D3">e</font><font color="008B8B">t</font><font color="FF7F50">h</font><font color="F5F5DC">i</font><font color="red">n</font><font color="0000CD">g </font><font color="008000">l</font><font color="FFE4E1">i</font><font color="D87093">k</font><font color="3CB371">e </font><font color="800000">t</font><font color="4169E1">h</font><font color="DDA0DD">i</font><font color="red">s</font>?

Produces this:

How about something like this?