I think silver it is, keep true to spec. I believe only circa 16 RHD Z3M S50 were made in Dakar Yellow as it was only introduced as a colour late in the S50 model.On a highly desireable car like a Z3M in a rare colour like Dakar Yellow (can’t think for the moment if I’ve even seen another) I would keep it subtle. Let the body colour do the talking.
I would have black or silver.