Bridges what color?

[Sumpter250]

There are still some of the C&NW bridges painted C&NW green. My high level dual gauge steel arch bridges (old modules) are dark gray, the rest start with Grimy Black, and get weathered mostly with rust. If memory serves me, the LIRR bridge across the Shinnecock Canal was silver, the similar road bridge (RT 27/ now RT27a), just to the south, was black.