As per KISS metrics, these four colors are preferable by people. They are, Blue, Green, Red, and Purple color. They attract more than 75% of the population. Naturally, they are the as best color for mobile apps.
What is the most common app color?
One of the insights we gained through this research was that blue is the most popular color for icons in the app store. Think about some of the most popular app icons—Google Calendar, Apple App Store, Safari, Shazam, Twitter, LinkedIn, Facebook. The color blue is found in every category and every industry.
Which colors attract more attention?
Red is the color of power. It gets people's attention and it holds it, which is why it's the most popular color for marketing.