Hi mate. That's one mint-looking specimen.
I've seen a couple photos of a red mk2 vts, colour coded bodykit parts, and gloss white indianapolis rims. I this it was magenta also.
These photos can be found there:
http://alex.insaniak.com/saxonetwork/suki.php
It looks amazing in my opinion. Especially the rims. Not sure about color coding, but I like it both ways.
Painting the lower, concave part of the rear bumper black is a nice visual mod on saxos of a few colours aswell, red included. Color coding would be more invasive, and this one could be done with some kind of a peelable paint.
Other than that I would just lower it very slightly and maybe put a nice, just a tiny bit louder exhaust.
Even if you don't do anything to it, magenta red is one sexy colour for a saxo.