Colors may can even influence your appetite. Red, yellow and green have the power to boost your appetite. They are the colors of fruits and vegetables. Restaurants often use red in their interior. Green is associated with salad, leaves, we decorate our food with some greenery for a reason.
Blue, violet and grey vice versa may reduce appetite. That is because the food of these colors is rare in nature.
Can you imagine yummy grey food? Ok, maybe Eastern sweet 'halva', not many other options. So, that is not a very good idea to promote
your café or restaurant with completely dull and grey profile. Also keep this information in mind if you are a food blogger.
But if you promote a diet, not using colors which boost appetite will make sense. As it would be logical to use blue and violet plates if you are on a diet.