Change the default color for buttons and links
When you create items such as links or buttons, a default color is assigned to them. The base default color comes from the Beaver Builder Theme preset, which can be set at Customize > Presets.
You can override the preset default and set a custom default accent color at Customize > General > Accent Color.
You can also create a number of custom default settings just for buttons, which overrides the accent color settings.