gnome-shell/data/theme/gnome-shell-sass/widgets/_misc.scss

// URLs
.url-highlighter { link-color: $link_color; }

// Rubberband for select-area screenshots
.select-area-rubberband {
  background-color: transparentize($selected_bg_color,0.7);
  border: 1px solid $selected_bg_color;
}

// User icon
.user-icon {
  background-size: contain;
  color: $osd_fg_color;
  border-radius: 99px;
  &:hover {
    color: lighten($osd_fg_color,30%);
  }

  & StIcon {
    background-color: transparentize($osd_fg_color,0.95);
    padding: 18px 20px 22px 20px;
    width: 88px; height: 88px;
    border-radius: 99px;
  }
}

.user-widget.vertical .user-icon {
  icon-size: 128px;
}

.user-widget.horizontal .user-icon {
  icon-size: 64px;
}

// Input Source Switcher
.input-source-switcher-symbol {
  font-size: 34pt;
  width: 96px;
  height: 96px;
}

// Window cycler highlight
.cycler-highlight {
  border: 5px solid $selected_bg_color;
}

// Text
.headline { @include fontsize($base_font_size + 1); }
.lightbox { background-color: black; }
.flashspot { background-color: white; }


// Hidden
.hidden { color: rgba(0,0,0,0);}

// Caps-lock warning
.caps-lock-warning-label {
  text-align: center;
  padding-bottom: 8px;
  @include fontsize($base_font_size - 1);
  color: $warning_color;
}