Look up subtractive saturation, where when colors become more saturated, they get darker and denser. This is a byproduct of analog printing, and a big part of the film look that most people overlook. When you crank the saturation on a digital photo, it will start to look garish pretty fast if you don’t also control the brightness as well.
These are also scanned from paper, which has a limited dynamic range, essentially producing a lifted black point and very low white point relative to what a digital display can do.
