gnome-shell/data/theme/gnome-shell-sass/widgets/_end-session-dialog.scss

/* End Session Dialog */

$end_session_dialog_width: 28em;

.end-session-dialog {
  spacing: $base_spacing;
  border: 1px solid $bubble_borders_color;
}

.end-session-dialog-list {
  padding-top: 20px;
}

.end-session-dialog-layout {
  padding-left: 17px;
  &:rtl { padding-right: 17px; }
}

.end-session-dialog-description {
  width: $end_session_dialog_width;
  padding-bottom: 10px;
  &:rtl {
    text-align: right;
  }
}

.end-session-dialog-battery-warning {
  width: $end_session_dialog_width;
  color: $warning_color;
  padding-top: 6px;
  &:rtl {
    text-align: right;
  }
}

// user profile picture
.end-session-dialog-logout-icon {
  border-radius: 99px;
  width: $base_icon_size * 3;
  height: $base_icon_size * 3;
  background-size: contain;
}

.end-session-dialog-shutdown-icon {
  color: $fg_color;
  width: $base_icon_size * 3;
  height: $base_icon_size * 3;
}

.end-session-dialog .dialog-list-title {
  color: $warning_color;
}