As website owners, we want users to click on some of our buttons. Sometimes the purpose of the site is to just click on the button. If you do not believe it, check out this site. This site receives 2 million visitors every month.
It's really cool. "Hi, I'm an Internet entrepreneur." - "Great, what have you built?" - "I list the useless sites."
You should have noticed it when you're looking at the site.
The button was red.
Red CSS gradient perfect choice for buttons. Of course, it can also be used for other site elements.