First of all, provide more colors for the baby. You can post some picture calendars with harmonious colors in your baby's room. You can always put some soft sheets and quilts on the baby's crib, and you can draw a seven-color wax on the wall of the crib. You can also put some colorful colored balls and plastic toys in your baby's sight, and make full use of colors to stimulate your baby's vision, which is very helpful for your baby to know colors.

Secondly, if the baby can stare at a certain color or turn his head to see other colors, adults can point to these toys and say to the baby, "This is a red balloon", "That is a white rabbit" and "This is a yellow flower" to deepen the baby's perception of colors.

Third, the baby 1 year-old or older, when babbling, adults and babies can play the game of "I say, baby refers" together. For example, you point to balloons of several colors and ask, "Which is the red balloon and which is the blue balloon?" Let the baby point at it. If the baby points right, kiss it and say, "The baby is really good. This is a red balloon." If the baby points wrong, say, "Look again, which is the Red Balloon?" If the baby still can't point it out, adults will repeatedly point to Le Ballon Rouge and say, "This is Le Ballon Rouge." Babies know red before they know green. You can also say, "Is this a red balloon or a green balloon?" Let the baby learn the pronunciation of "red, green and blue". You can also put toys of various colors, so that the baby can take out toys of the same color according to the requirements of adults.

Four, the baby to 1 year-old, adults can use a variety of colors to draw some familiar plants, animals, fruits and so on. Such as: sun, grass, flowers, leaves, apples, chickens, puppies, rabbits, ducklings and so on. And painted and said: "This is the red sun, this is the green grass, this is the little yellow chicken" and so on. You can also put all kinds of crayons together and let your baby help you color, such as drawing red flowers. Adults can say, "Please bring a red crayon for the baby and draw a red flower for the father …" As long as the baby is trained repeatedly and persuaded properly, he will fully understand the five colors of "red, yellow, green, black and white" when he is 3 years old.