If you change the color of the drinks you often drink, most people will not be able to recognize their own drinks. The University of Washington has done a lot of research on how color affects taste. In a research project, subjects can see the true color of the drink when they taste it. In this case, they can always correctly identify the taste of the drink. However, when they can't see the color of the drink, they will admit their mistakes. For example, when the subjects were not allowed to look at the color, only 70% of them tasted grape drink, and 15% thought it was citric acid. Only 30% of people who have tasted cherry drinks think it is cherry. Most people think that cherry drink is citric acid.
Red is the most appetizing color. Red food (and red itself) can stimulate appetite and give people a feeling of vitality. If you have a bad appetite, add something red to your food. The restaurant with red seats has obvious effect. When you sit down to eat, it will make you hungry. I used to be anorexic, I couldn't eat well, and I ate snacks when I was hungry, but the red seat helped a lot.
Because McDonald's used colors wisely, its red and yellow packaging was rated as the best food packaging. These two colors will enhance hunger, and at the same time, they are very friendly and unforgettable.
White food is easy for people to choose and forget that it also contains calories. This is why it is easy to be used in bread and snacks. You might as well use black bread boxes, which may weaken this effect.
Now that you know the skills, try to apply color psychology where you need it. Want to help your friend eat more? Then choose red and yellow food and use a red plate. Want to lose weight? Then use blue plates to avoid buying white food.