flood/client/source/sass/components/_priority-meter.scss

$priority-meter--track--level-0--background: rgba(#436076, 0.2);
$priority-meter--bar--level-0--background: #436076;
$priority-meter--track--level-1--background: rgba($blue, 0.2);
$priority-meter--bar--level-1--background: $blue;
$priority-meter--track--level-2--background: rgba($green, 0.2);
$priority-meter--bar--level-2--background: $green;

.priority-meter {
  height: 8px;
  position: relative;

  &__wrapper {
    cursor: pointer;
    display: inline-block;
    padding: 5px;
    user-select: none;
    vertical-align: middle;
  }

  &:before,
  &:after {
    content: '';
    display: block;
    position: absolute;
  }

  &:before {
    height: 2px;
    left: 0;
    top: 3px;
    transition: background 0.25s;
    width: 100%;
  }

  &:after {
    height: 100%;
    top: 0;
    transition: background 0.25s, left 0.25s;
    width: 2px;
  }

  &--max-2 {
    width: 18px;

    &.priority-meter {

      &--level-0 {

        &:before {
          background: $priority-meter--track--level-0--background;
        }

        &:after {
          left: 0;
          background: $priority-meter--bar--level-0--background;
        }
      }

      &--level-1 {

        &:before {
          background: $priority-meter--track--level-1--background;
        }

        &:after {
          left: 8px;
          background: $priority-meter--bar--level-1--background;
        }
      }

      &--level-2 {

        &:before {
          background: $priority-meter--track--level-2--background;
        }

        &:after {
          background: $priority-meter--bar--level-2--background;
          left: 16px;
        }
      }
    }
  }

  &--max-3 {
    width: 26px;

    &.priority-meter {

      &--level-0 {

        &:before {
          background: $priority-meter--track--level-0--background;
        }

        &:after {
          left: 0;
          background: $priority-meter--bar--level-0--background;
        }
      }

      &--level-1 {

        &:before {
          background: $priority-meter--track--level-1--background;
        }

        &:after {
          left: 8px;
          background: $priority-meter--bar--level-1--background;
        }
      }

      &--level-2 {

        &:before {
          background: $priority-meter--track--level-2--background;
        }

        &:after {
          background: $priority-meter--bar--level-2--background;
          left: 16px;
        }
      }

      &--level-3 {

        &:before {
          background: $priority-meter--track--level-2--background;
        }

        &:after {
          background: $priority-meter--bar--level-2--background;
          left: 24px;
        }
      }
    }
  }
}