This is an example of Triadic. Triadic used three colour equally spaced around the colour wheel which demonstrate in the image. It gives strong visual contrast while retaining balance.
This is an example of Split Complementary. - It split in three colour , blue , red -yellow and cyan. It seems like orange is the dominate colour and blue can the icon pop up.
This is an example of Complimentary. It’s shown in the image that blue is opposite yellow. The colour wheel didn’t show the same blue and yellow but it helps to understand more about the theory.
This is an example of Analogous. In this illustration, the artist used yellow , red , yellow –red and it tints and shades to create artwork. Yellow and its tint seems to be colour that make the art work stand out.
This is a example of monochromatic. As we know monochromatic is a single colour. This logo used blue , its tint and shade to enhance the scheme.
Triad colors are three colors equally spaced from one another, creating an equilateral triangle on the color wheel.
Split-complementary color arrangement results from one color paired with two colors on either side of the original color’s direct complement creating a scheme containing three colors.
Complementary are those that appear opposite each other on the color wheel.
Analogous based on three or more colors that sit side-by-side on the color wheel.