Escape characters including commas and parantheses in macro invocations?

Question

I have a macro definition:

!define FUNC(func) <font color="blue">""func""</font>

I would like to invoke it with a single multi-line text argument containing commas, angle-brackets and parentheses, viz:

X -> Y : FUNC(tfunc<T, U, V>(Really_long_arg,\n\
          Other_really_long_arg,\n\
          final_really_long_arg))

Is there any way to get what I want here (the whole argument in blue fixed-type on multiple lines)?

Thanks for any help.