This is a Psychological method used to associate colors with something the government/media wants. By infusing us with images in the media of the color, we will subconsciously associate those colors with the diseases and combined with scaring us, it will cause a negative association with the color. They do this over and over again through the media outlets and because it is repeated over and over again, our brain sub-consciously records this and makes the neuron connections and associations so we eventually don’t even think anymore, just react.