I would like to answer in French, but I will answer in English.
My overall comment would be that you're touching on some important elements. The rule of thumb that I use in research is that roughly 15% of the population at any given time is paying attention to politics and government and the other 85% is too busy getting the kids ready for school and everything else. Political marketers and government communications personnel often keep this in mind.
When you provide too much level detail, you're not going to really connect with a lot of people, so you try to keep things simple. For example, when you have advertising on, a political marketer would say to watch the advertising without the sound because for the most part, people are probably running around the house, and the television is on in the background, and what is it they see?
Why am I saying all this? I'm saying it because it gets back to the whole issue of why things like colours matter. It's not just about the issue of fairness. It's about something that is often used. In research we use phrases such as “cognitive shortcuts” and “heuristics”, which is using very few information processing abilities to quickly see things and make impressions. When you think about the concept of colour, I would simply say to you that it is exactly why that matters, because a lot of people don't have the time or interest to pay a lot of attention to things, and they make snap judgments based on small bits of information.