Color mixing card learning set Geometric design edition 4 types setColor mixing card learning set Geometric design edition 4 types set Using color mixing cards makes learning color emotions easy! You can easily learn color composition while actually coloring, such as "warm and cool colors," "hue," and "brightness." Color over the numbers to understand how colors work! After learning, you can color the figures without numbers with the colors of your choice. The color numbers of the color mixing cards are written on