@mixin euiHeaderDarkTheme($backgroundColor) {
  background-color: $backgroundColor;
  border-bottom-color: lightOrDarkTheme($backgroundColor, $euiHeaderBorderColor);

  .euiHeaderLogo__text,
  .euiHeaderLink,
  .euiHeaderSectionItem__button {
    color: $euiColorGhost;
  }

  .euiHeaderLink-isActive {
    color: makeHighContrastColor($euiColorPrimary, $backgroundColor);
  }

  .euiHeaderSectionItem {
    &:after {
      background: lightOrDarkTheme($euiColorDarkShade, $euiColorLightestShade);
    }
  }

  .euiHeaderLogo,
  .euiHeaderLink,
  .euiHeaderSectionItem__button {
    &:hover {
      background: transparentize(lightOrDarkTheme($euiColorDarkShade, $euiColorLightestShade), .5);
    }

    &:focus {
      background: shade($euiColorPrimary, 50%);
    }
  }

  .euiHeaderSectionItemButton__notification--badge {
    box-shadow: 0 0 0 1px $backgroundColor;
  }

  .euiHeaderSectionItemButton__notification--dot {
    stroke: $backgroundColor;
  }
}