netbox/netbox/project-static/styles/flatpickr-dark.scss

// Dark Mode Styles for Flatpickr.

.flatpickr-calendar {
  background: $gray-700;
  color: $body-color;
  box-shadow: 1px 0 0 $gray-600, -1px 0 0 $gray-600, 0 1px 0 $gray-600, 0 -1px 0 $gray-600,
    0 3px 13px rgb(0 0 0 / 8%);
  border-radius: $border-radius;
  & span.flatpickr-weekday {
    color: $gray-400;
  }
  &.arrowTop:before,
  &.arrowTop:after {
    border-bottom-color: $gray-700;
  }
  .flatpickr-months {
    & .flatpickr-month {
      color: $body-color;
      fill: $body-color;
    }
    & .flatpickr-next-month,
    & .flatpickr-prev-month {
      color: $body-color;
      fill: $body-color;
    }
    .flatpickr-current-month .flatpickr-monthDropdown-months {
      background: $gray-700;
    }
  }
  .flatpickr-day {
    color: $body-color;
    &.today {
      border-color: $gray-200;
    }
    &.selected,
    &.startRange,
    &.endRange,
    &.selected.inRange,
    &.startRange.inRange,
    &.endRange.inRange,
    &.selected:focus,
    &.startRange:focus,
    &.endRange:focus,
    &.selected:hover,
    &.startRange:hover,
    &.endRange:hover,
    &.selected.prevMonthDay,
    &.startRange.prevMonthDay,
    &.endRange.prevMonthDay,
    &.selected.nextMonthDay,
    &.startRange.nextMonthDay,
    &.endRange.nextMonthDay {
      background: $blue-300;
      border-color: $blue-300;
      color: color-contrast($blue-300);
    }
    &:hover {
      border-color: $gray-200;
      background: $gray-200;
      color: color-contrast($gray-200);
    }
    &.flatpickr-disabled,
    &.flatpickr-disabled:hover,
    &.prevMonthDay,
    &.nextMonthDay,
    &.notAllowed,
    &.notAllowed.prevMonthDay,
    &.notAllowed.nextMonthDay {
      color: $gray-500;
    }
  }
}