How to choose the button color (contrasting) to fit into the style?

Question

Design

What color of the button to make (a gradient preferably of two) so that it is contrasting and fits in.



While the site has 2 colors, there is not enough 3rd contrast.

Currently using colors
#171D3E
#4d63dd

Answer 1

There should be two of them. For a light design, two primary dark colors.