Get features(styles) from GeoJson

Hi There

I'm looking to add GeoJson drawings to a leaflet map, is it possible to get the fill / stroke set from the GeoJson, for instance like the GeoJson created here: http://geojson.io/#map=5/-23.966/10.986 I have been doing a lot of searching and have been testing to see if I can get it working with no success. There doesn't seem to be much around on this? Any help would be much appreciated.

Thanks

Sacha