Blue and red
Red and blue make up purple, or violet.
Violet is a secondary color. Secondary colors are achieved by mixing two of the three primary colors in equal proportions. Violet is made by mixing Blue and Red, therefore the answer is two.
red and blue
how to combine color to make it violet
combine red and blue to make it violet
Red and violet
Red and violet
brown
Indigo.
The color red can be changed to violet by adding the color blue. Red and blue are both primary colors, a violet is a secondary color.
Dark violet/Indigo (Dark blue-purple).
Red is a primary color. Violet is a secondary color resultant from mixing equal parts Red and Blue. If you combine the two you will get the tertiary color Red-purple (or Red-violet).