petrol smell in car - is this the source (injector pic) maybe?

Noticing occasional smell of petrol in a Amica Si. Can't see any signs of leaks except this orange discolouring on 2 of the 4 injectors.

I thought maybe was rust at first but seems more than that. Is this colour typical of petrol leaking from the seal?

If this is the leak does it mean just new seal - or do I have to get new injectors?

Thanks