.wp-block-button__link {
background: #54b77e;
color: #fff;
}
.is-style-outline .wp-block-button__link:not(.has-text-color) {
color: #54b77e;
}
.wp-block-button__link:hover,
.wp-block-button__link:focus,
.is-style-outline .wp-block-button__link:hover,
.is-style-outline .wp-block-button__link:focus {
background-color: #e4572e;
color: #fff;
}