Color Spot is probably nothing new in the world of photography and you can use it to make your photos more interesting. What can you get?
1. Give your subject a clear definition
By isolating a subject with color, you can give it clear definition and help it stand out more in a frame. Plus, it makes your subject look more impactful.
2. Helps you better understand the relationship between colors
Some colors will look good together, but there are also those that don't match. By using color spot, you can understand more about color. You can start by looking for the color wheel as a guide. The way to use it is to look at colors that are opposite each other, which colors are suitable when combined.
Source : https://digital-photography-school.com/
3. Look, observe before shooting
By using color combinations, you will pay more attention and really observe until you get a composition and color combination that you feel is right. So don't get into the habit of just snapping and praying that the results are good ;)