"Rig fo red" errrr blue

[Hitman]

the sub is "rigged for red" however on the few ww2 subs that i have been on it has actually been blue not red, i was wondering if it is possible to change the interior lighting at night time to blue

AFAIK, in real WW2 US submarines they rigged for red, and not for blue. Sources are several, and all point in the same direction (At least in fleet boats, not in the S-Boats) in the books I have readed: O'Kane, Calvert, etc. The red light was even responsable for one boat running aground: In the early stages of the war, where that rigging for red was new (As proven by the fact that older S-class boats rigged for blue) one navigator plotted the course under red light (Anything written/painted in red becomes invisible under red light) thus missing that there was a red mark in the map indicating coral reefs . The boat went aground!