In
Struts 1 there are standard messages that you can use to apply fonts and other formatting to the <html:errors /> tag. Example:
errors.header=<UL>
errors.prefix=<LI>
errors.suffix=</LI>
errors.footer=</UL>
The errors.header and errors.fotter content apply to the entire block of messages, whild the errors.prefix and errors.suffix content apply to each individual error message. You could easily apply a CSS style using these standard messages.