To rule out color blindness, Ishihara plates may be used. If a preschooler can find a shape inside of the Ishihara plate, then the child is probably not color blind.
Another simple test that early childhood educators use when children are able to distinguish “same and different”, is to put a variety of crayons or colored objects in a place, such as on a table or floor, and hand the child one of the colors and have the child find one that is the same color. Try this several times with various colors to see if there are any colors the child cannot match. People who are color blind will be able to identify some colors, but not others.
In many cases, children learn to identify colors before they learn the concept of “same and different”. This is why the Ishihara plates are recommended.
Once you have determined that the preschooler is not color blind, you should feel certain that this child is capable of learning to identify and name the color purple. To help your child remember the color purple, you must get this color deep-rooted into the senses.
For example, your child should closely identify not only what purple looks like, but what purple might feel like, smell like, and taste like. While purple does not typically have a sound, you can get your preschooler to associate sounds or songs with the color while teaching about it.