Programming :: Put All The HTML In A Print Statement?

I have a site which will have, for example, a login system where people have to enter their usernames and passwords, depending on which they'll be let in to the site. So, in code, I've got a line like:

if ($_POST['password'] == $password) {
then do whatever
}
else { print "Wrong password" ; )

My problem is, this "Wrong password" printing is just a solitary line, not keeping with the colours and style of the site, and it looks very bad. I want to ideally, output some HTML, which will have a picture, and print the "Wrong password" in the font and colours I desire. Do I have to put all the HTML in a print statement, and then deal with the nightmare of escaping all the quote marks in it with a ""? Or is there a cleaner method to the whole thing? Maybe something like this -

if ($_POST['password'] == $password) {
then do whatever
}

[code]....