Retrospring/app/assets/stylesheets/overrides/_buttons.scss

.btn {
  color: RGB(var(--body-text));
}

@each $color in $color-names {
  .btn-#{$color} {
    color: RGB(var(--#{$color}-text));
    background-color: var(--#{$color});
    border-color: var(--#{$color});

    &:hover {
      background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.10),
        rgba(0, 0, 0, 0.10)
      ) var(--#{$color});
    }

    &:active {
      background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.25),
        rgba(0, 0, 0, 0.25)
      ) var(--#{$color});
    }
  }

  .btn-outline-#{$color} {
    color: var(--#{$color});
  }
}