The clip we saw on AMC from the original 1938 Robin Hood starring Errol Flynn was not colorized as we originally suspected but in an early and eye-gougingly bright Technicolor. I swear I thought it was colorized but no, apparently it was filmed in color.
According to IMDB, they used all 11 Technicolor cameras in existence (from Technicolor) to film the movie and it’s huge Avatar-like success is what lead to the adoption of color movies.
It’s the 1922 Robin Hood starring Douglas Fairbanks that is in B&W.
That answers my random outstanding and context-free question of the day.