green
Red :D
Contrasting and complimentary colours are the same thing. Green is a secondary colour. You achieved a secondary colour by mixing two of the three primary colour. In this case green is the mixture of Yellow and Blue. The complimentary colour to a secondary colour is the primary colour not used to create it; in this case the complimentary (or contrasting) colour to green is red.
The contrasting color of red is green. These colors are opposite each other on the color wheel, creating a strong visual contrast when used together.
They are the opposites on a colour wheel.
Red and green are contrasting colours, and green next to red stands out.
I believe its because they are the most contrasting colors to the human eyes, but I don't really know
stripe
Absolutely, its a great contrasting look
The contrasting color of yellow is not violet, nor indigo, But blue. Not sky-blue, or aqua, but deep blue as seen on the left.
RED!
Red
Red is the colour for communism.