Water tank color

I just purchased a Cambells water tower kit , I’m modeling the NYC, is there any official color the NYC painted their water tanks? I’m modeling the 1940’s.

This is a circa 1900 photo but the wooden water tower looks pretty dark to me…

http://www.rr-fallenflags.org/nyc/nyc-sylsta-adm.jpg

The one in this ca 1950 photo does too…

http://www.rr-fallenflags.org/nyc/nyc-sprdep-ark.jpg

LOTS more here…

http://www.rr-fallenflags.org/nyc/nyc.html

Good luck,
Jeff