can't get behind Manhatten Green personally ... i would go for the brighter 'oxford green' which to me pops more:
https://g05.bimmerpost.com/forums/sh....php?t=1842418
and, for me, where there is a choice of caliper colour on a car, they should match the colour of the paint ... but definteily not be black or grey as you NEED TO SEE THEM!
... it's all a personal choice of course!