One of the core stages of digital product creation is the
user research. Defining and analyzing the target audience designers learn what they expect from a website or app. Age, gender, and culture can influence the preferences of a potential user. For example, children like yellow color pretty much, but as we become adults it usually seems less attractive. Men and women generally prefer cool colors such as blue, green and their tints. Unlike women, men usually prefer achromatic colors including white, black and gray.
The same goes with bright colors. Even if you create a design for an entertaining app, you need to consider the specifics of the target audience. Middle-aged people usually prefer light UI and they may not like bold colors across the screen finding them a distraction.