The taste and smell of color are related to human beings, just like other animals, they maintain their lives by ingesting food and breathing air. Taste and smell are sensory organs that provide information about diet and air quality. From the perspective of ensuring the safety of breathing and eating, smell is more important than taste. Both senses rely on the stimulation of chemicals to cause feelings. As far as the quality of food is concerned, in the survival experience of human beings or animals, people always follow a specific process to judge: first, visual observation, second, smelling its smell, and finally, tasting its taste with their mouths. This behavior order will never be reversed, so people call cooking the art of color, fragrance and taste. It can be seen that the relationship between color vision, taste and smell is determined by survival behavior. For humans (and non-human primates), the chemical transmission of smell is a degraded information transmission function, but for other animals, the function of smell is still very important for survival. The substances that children learn through the sense of smell are called pheromones. The sense of smell caused by these substances is closely related to the environmental image and the visual image of individuals of the same or opposite sex, which will play an important role in regulating the behavior of animals in the environment. Therefore, there are biological reasons for the perceptual experience of color, taste and odor transmission. The relationship between color and smell is of great significance in the product development and packaging design of food, beverage, cosmetics and daily chemical products. According to the impression of taste and smell, colors can be divided into various types. Here are some examples.

() Appetite color can stimulate appetite from the appearance impression of delicious food, such as freshly baked bread, roasted grains and beans, barbecue, ripe red grapes, blackberries, etc. So orange, sauced meat, warm brown and purplish red are all such colors, and most food pigments belong to such colors.

(2) Odor color is opposite to appetite color, and it is often associated with the appearance impression of rotten food and dirt, and various low-purity colors with gray tones, such as gray-green, yellow-gray, purple-gray, etc.

(3) Aroma color "Aroma color" often appears in praise descriptions, which comes from people's feelings about tender leaves and flowers of plants, and also from people's reference to this natural beauty, especially women's costumes and self-county decorations. The most fragrant color is light yellow-green, followed by high-definition blue-purple, so it is often used in the packaging design of perfume packaging, cosmetics and beauty care products. Aromatic colors are mostly feminine.

(4) Strong flavor condiments, brewed food, coffee, chocolate, brandy and wine, black tea, tobacco, etc. Gas and taste are relatively strong, and often the color is relatively dark, so brown, deep purple, blue-green and so on all belong to this kind of color that makes people feel strong.