since the car is very subtle and clean looking putting a pink or other wild colour in the engine bay will make it look tacky imo.
pearl grey imo would be the perfect colour for any clean engine bay. have the bay smooth and grey pearl with then engine block silver and the rocker cover lp2 with polished IC pipes etc will make it look so much better.
this is petries s13 not in pearl but it draws more attention to the engine and parts inside the bay a good bit better