Is that the only part of the file that is red? I'm guessing that you have syntax highlighting turned on, which makes different keywords or text types show up in different color.
Did you put a quotation mark before the line? Usually red text means it is enclosed by quotation marks "".
If you want to turn off the colors alltogether, try typing "syntax off" in the command mode (after pressing : ). You can also edit the .vimrc file in your home directory, and find the part where it says syntax on, and change it to syntax off. That will make it stay that way.