Question:
in the MapComplete-theme about rainbow crossings "crossing:marking=rainbow" is used, while here they are mapped with surface:colour=rainbow.

And in the wiki I still find a third way to map them: https://wiki.openstreetmap.org/wiki/Key:crossing:markings
crossing:markings=lines:rainbow,
crossing:markings=zebra:rainbow

Can we choose one only way how to map them?