.button-link {
  display: inline-block;
  padding: 0.6rem 1rem;
  background: #ddd;
  border-radius: 6px;
  text-decoration: none;
}
.button-link,
.button-link:link,
.button-link:visited,
.button-link:hover,
.button-link:active {
  color: #0d1f4b; /* your dark blue (example) */
}