An in-camera exposure on a holographic plate is going to be something like 2 minutes at f/8 in bright sunlight, or at least that's what it takes for a Lippmann developer (post #70).
A much simpler approach would be to take sequential exposures of a still-life, and/or, make separations of the red & green from regular color film.
You should look into true color toning, where the silver becomes C/M/Y. There was a process called Defender Chromatone that used this method. Unfortunately, the toning solutions where proprietary, but I think there are some formulas in Friedman's History.