We’re able to see different colors because of our retina’s innate ability to differentiate frequencies of light waves.

Yellow tends to be used for things to convey Joy, Attention, Intellect.

However, yellow is not a good choice for the background of your app or as the main interface.

After all, ads are really well thought-out experiments in persuasion and manipulating human psychology.

It’s also about selling your product and appealing to certain instincts or desires that people have.

How to combine colors to create color palettes

The text above is a summary, you can read full article here.