Recently I watched Schindler's List and it got me curious as to how they made one color appear in a black and white frame (like the little girl in the red dress when the rest of the film is in B&W).
Does anyone know how I would go about doing that (preferably with Premiere)?
It's called "colour (or color) Pass". This has been covered many times on the forums and i would suggest you do a search for colour pass or color pass.