I love sidemarkers - on cars that come with them OEM.
In other words. don't do it to your B13. It makes looks your fender look like has a big pimple.
I had them on Saabs that I have owned in the past... On my last Saab 9000T I was able to get a set of smoked side markers which replaced the orange ones - looked great. But again, they were OEM.