Does any body know what is the color code on 1988 Paso Limited Edition(pearl white) ?

Click on 'Links' in the Registered User Menu on the left. Somewhere in there (I think it may be in the 'Parts Interchangeability List') there is some info on colours, which may give you a lead.

However, if I may make a suggestion, unless you are planning to repaint only a section or two, you might consider repainting all panels iridescent pearl white (like a real pearl). It's a special paint application, and a little more expensive. That's what the first owner of my bike did, and man, it's beautiful. You can see it on the first page of the 'Gallery' (Erskine Hewett), although it's much better in real life. You can see the air cooling outlets in the rear have been sprayed in smoky grey too.

Another option - and I did this with my '88 blue when I split a mirror pod open (0mph driveway tip over) - if it's available to you, visit a custom paint shop, or one that specializes in vehicle paint, and bring a piece of the fairing you want to match. They should have a light gun that can 'read' the paint and that will give you the code that matches the paint on your bike.

I used this method to repaint my mirror pod instead of chasing down the original paint index because the bike's over 15 years old; if there was any fading in the paint due to sun or time, it may not match the original paint number anymore. So I just walked with the pod in hand, they zapped it, got the color index, and voila - it exactly matches the rest of the bike.

This may not be an issue with the Limiteds, I realize, but it can certainly be an issue on the red Pasos since red in general is more susceptible to sun fade.