How to avoid vim marking long lines as red when the line exceeds the 73 character limit

I am using vim

fortran 90 to edit a file. The line of code exceeds the 73 character limit:

  print*, &
  "Not sufficiently large neighbours list in dynstillweb, increase max_n"

      

        
        
        
      

    

The problem is that not only does vim mark red exceeding characters (say se max_n"

), but the rest of the code instead of the usual white, yellow and blue colors, which makes the code easier to read. Is there any command to insert into the file .vimrc

to tell vim to increase the character limit and thus avoid the massive red marking?

Thank!