In Asian philosophy, all things are divided into five elements of Metal, Wood, Water, Fire and Earth. They are also known as the Five Elements, Five Phases, the Five Agents, the Five Movements, Five Processes, and the Five Steps/Stages.
So the colors also belong to different elements. If the seeds have different colors, then they will have the properties of the matched element.
If the seeds have black color, then they belong to water, they have the properties of water, these seeds food is good to kidney.
If the seeds have white color, then they belong to metal, they have the
properties of metal, these seeds food is good to lung.
If the seeds have yellow color, then they belong to earth, they have the
properties of earth, these seeds food is good to stomach.
If the seeds have red color, then they belong to fire, they have the
properties of fire, these seeds food is good to heart.
If the seeds have green color, then they belong to wood, they have the
properties of wood, these seeds food is good to liver.
All organs are supporting our brains. So in Asia, they highly recommend eating seed food with all kinds of colors. So they body will have very good health which lead to healthy brain and spiritual health.
Adult Chinese Courses in Singapore provide a lot of useful information related to Chinese culture. You will find that these information is so simple but very useful in keeping health.