Advice on Dark Blue Mettalic Aerosol

[Roscopeco]

Hey chaps can anyone point me in the right direction with a blue mettalic aerosol to paint a tc body ? I've tried fastrax rally blue thinking it was what I wanted but it's far too light . I originally backed it up with white , but could it be backed up with another colour to make it darker ?

This is the colour id like to achieve



Tia