Early color TVs were spectacularly complicated. About 3X more so than a B&W set. Three times as many tubes to fail, and three times as many tubes generating heat to cook and cause failure or at least drift in other components. 3 dot color CRTs also generate a ton more heat than monochrome because they have a mask that blocks 2/3 of the electrons leaving each gun. (fixing this was part of why Sony’s trinatron tube was a big deal)
I am an electrical engineer with a lot of RF and analog experience, and I still can’t work out how the hell a convergence board worked…
By the 1960s, B&W TVs pretty much just worked, maybe needing a tweak to the V.hold once in a while. Color TVs through the 1970s required regular futzing if you wanted anything near true colors, and most consumers just learned to live with poor convergence causing colored auras in part of the picture.
What I was trying to say was that simply calculating the cost of raw film stock for color vs. black and white does not fully explain the cost difference between making a movie in color vs. making one in black and white.
The lighting requirements for color were different. That required a soundstage that had the extra lighting, as well as a cinematographer who knew how to deal with that much light.
Until Eastmancolor came along in the early 1950s, Technicolor was pretty much the standard for color production in Hollywood. Technicolor required special cameras, which in turn required specialized camera operators, so you couldn’t assign just any camera operator the director wanted. (Kinemacolor, the technique developed in England, also required special cameras.)
Then there was the issue of the slightly but not negligable cost difference of color prints vs. black and white for distribution to thousands of theaters.
Using beowullf’s cite for GWTW, let’s say the entire added cost was 10-12 percent. The extra cost might be worth it for GWTW, but not for the dozen Andy Hardy films that MGM cranked out on the stock sets and back lots.
Another reason it took so long for color broadcasting to become the norm was corporate infighting. When the color standards were being debated before the FCC in the late 1940s, there was a contest between systems backed by CBS (a partly mechanical system that would couldn’t be received by existing TVs) and NBC (an all electronic system that was compatable with B&W sets). The CBS system at first gave a superior picture and was originally approved by the FCC. When NBC used its manufacturing and lobbbying power to get the FCC to overturn the decision in 1953, CBS in a fit of pique kept almost all its programming in B&W. At that time CBS was the clear No. 1 in the ratings. With ABC having very little color programming either (mostly due to its chronic funding problems), very few people in the fifties would put up with the troublesome color TVs just to get one channel. The book “Tube” by David and Marshall Fisher gives a great account on the struggle for color TV.