Only by changing the cs interpreter code.
Look in the ui.js file and at the top there is a function called printx
within it there is a series of .replace lines, like:
.replace(/\\[i\\]/g, '<i>') .replace(/\\[\\/i\\]/g, '</i>')
You want to add two more, similar to this:
.replace(/\\[blue\\]/g, '<span style="color:blue;">') .replace(/\\[\\/blue\\]/g, '</span>');
Note that the semicolon is only necessary on your last line.
Whether or not this sort of modification will work with published titles, I cannot say.