Once is enough Marc.
Colour influences us in several ways. We all have our favourite colour schemes and will try to fob them off in every single job we put forward.
You suggest that colour plays a role in modern society. I need a few examples from you to judge whether this is so. Certainly I prefer living in an architecturally mainly white environment than what e.g. Bournemouth has on offer to global urban design.
Successful industrial design is my first criterion before making a purchase - assuming here that design genuinely plays a role. I don't care how my broccoli is packaged but I do pay attention to the shape of a kitchen stool. Colour is one with the design, they cannot be separated. Both shape and colour reflect the designer's aesthetic thought process, as do shape and decoration.
Of course as a designer I have a keen awareness of the appropriateness of certain colours to certain commercial applications. But there is no formula. Only common sense. Imagine advertising bread with a blue or green text. Mould! Or a line of feminine intimate products based on red. They're always pastel-toned for a reason, mainly that a used tampon is red and manufacturers are interested in selling fresh new ones. Try advertising a car to a male or female audience featuring an orange-coloured vehicle. No sales. (I never understood that one, but it's absolutely the case).
These are some ideas which I regard as facts. Let's see what others have to say. And stop posting twice.