I am really sorry that it is not working for you. Actually, I created a temptable and tried executing the code that you are using;

my $ref = $dbh->selectall_arrayref("
           select name, email from testtable") || die $dbh->errstr;

foreach my $person (@{$ref}) {
        my ($name,$emai) = @{$person};

        print "<font color=\"red\" >Name :  $name  </font>";
        print "<font color=\"blue\"> Email : $email </font><br>";     
+   
}
[download]

It runs just fine even with the "Dr. John Bull". Please check the database if some special characters are not slipped thru.
here is the output
Name : Dr. John Bull Email :

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