I have no idea where to ask this, so I'm gonna ask it here.

Those of y'all who know more about Japanese culture and society than I do, I have a colour question for you. If the Japanese government were looking to design a uniform for a national police force and wanted it to look both authoritative ('we report to the central government, not any lesser authority') and reassuring ('no, seriously, we're here to help'), what colour would they be most likely to use?