src/platform/site-wide/sass/modules/_m-button.scss
@import "~@department-of-veterans-affairs/formation/sass/shared-variables";
/* Adds additional extensions to .usa-button */
.usa-button-darker {
background: var(--vads-color-primary-dark);
&:hover,
&:focus {
background: var(--vads-color-primary-darker);
}
}