As stated it should be on the firewall. There are three reds for 1989,Bright red, Colorado Red, and Dark Vivid Red.
here is a link to a color chip page for 1989 Jeep http://paintref.com/cgi-bin/chipcrea...=Jeep&ret=code
I use PPG products at my shop. Are you painting it yourself? Do you want to go with a single stage or a base clear?
The PPG /Dupont numbers for the paint are to the right of the color chip. Take that number to your local paint jobber and they can set you up. A word of advice learned the hard way, dont get the "value brands" for your basecoat in a red. ie Shopline, Omni, Nasson. Get DBC or Chromabase. The cheaper brands dont cover as well and you will use more paint in the long run as well as the colors can and most times are a little "off". The Shopline/Omni clear coats are just fine. Make sure you get a polyurethane and not a acrylic clear