Match two colors to make them blue

Quick answer：

Matching two colors to create a blue shade typically involves using complementary colors. For a blue, one color should be a primary color, such as red, and the other should be a secondary color, like yellow. By combining red and yellow in varying proportions, you can achieve different shades of blue. Additionally, adding a small amount of a complementary color, such as green, can enhance the blue's intensity and clarity.