What makes the color red?

Red is a primary color and cannot be produced by mixing other colors. Red, blue and yellow are the three primary colors. read more

There are six tertiary, or intermediate, colors: red-orange, red-purple, yellow-green, yellow-orange, blue-green and blue-purple. read more

Mixing red with the secondary color orange will make orange-red, but you should limit the amount of orange to an equal part or less to prevent the hue from becoming more orange than red. Similarly, mixing red with the secondary color violet will make violet-red, but you should limit the violet to an equal part or less. read more

Red is the color at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan. read more