Any neutral metallic will go nicely with a mix of black & silver componentry and be quite elegant; with regard to colors, any dark or intense hue will probably work just fine. Dark colors will appear more harmonious with black components; intense colors will project 'danger' signals.

In visual terms, excessive high-contrast areas will impart a 'busy' & possibly grating look to your overall design: it can be seen as either visually exiting or conversely, neurotic.

If it's done correctly, high-contrast designs can convey instinctive 'threat/warning' messages (think of poisonous insects, Amazon tree frogs, or tigers' stripes). The 'poison frog' color schemes frequently used on supercars like Lamborghinis & McLarens are a deliberate use of this effect, also reflected in road-warning traffic signs.