message: Fix up page header cover buttons fill color
diff: @@ -43,7 +43,7 @@ $-cover-buttons-height = $button-md-line-height + 20px
  padding-top: 0
  .page-header-cover-buttons
  - theme-prop('background-color', 'darkest')
  + theme-prop('background-color', 'darkest-subtle')
  position: absolute
  margin-bottom: 0
  left: 0
  @@ -53,7 +53,7 @@ $-cover-buttons-height = $button-md-line-height + 20px
  text-align: center
  &-inner
  - theme-prop('background-color', 'darkest')
  + theme-prop('background-color', 'darkest-subtle')
  position: relative
  display: inline-flex
  height: $-cover-buttons-height
  @@ -67,7 +67,7 @@ $-cover-buttons-height = $button-md-line-height + 20px
  height: $-half
  path
  - theme-prop('fill', 'darkest')
  + theme-prop('fill', 'darkest-subtle')
  &.-left
  left: -($-half) + 1px
  