only models with Tritium dials will fade over time.. This watch is from 1989. If you have a new model with Luminova it won't change colour. But I am sure that others in this forum knows exactly how it works....
...my watches, they will still appear whitey white and no patina...good and bad. But its ok.. My T Swiss Made T Tag has patina after 13 years and hands turned dark brown, haha..