cause that “weird” color-tint is most likely the version the original audience saw in 1922 in cinemas; as the intro-description of this restored version reads:
“a tinted nitrat print with french intertitles from 1922…was used as a basis for the restoration.”
lots and lots of silent movies were tinted for different mood in scenes and especially for night/day-scenes (blue-night, light amber/yellow-day)
basic information on old tinted “black/white”"-films: