@lookup-background: #e4b9b9;
@lookup-list-item-hover-background: #5f4834;
@hyperlink-item-hover: #fff;
@hyperlink-text-colour: #757575;

custom-lookup {
  input {
    width: 100%;
  }
  ul {
    background: @lookup-background;
    padding: 0 5px;
    list-style: none;
    position: relative;
    display: list-item;
    li {
      &:hover {
        background: @lookup-list-item-hover-background;
        a {
          color: @hyperlink-item-hover;
        }
      }
      a {
        color: @hyperlink-text-colour;
        text-decoration: none;
      }
    }
  }
}

custom-lookup {
  input {
    width: 100%;
  }
  ul {
    background: #fff;
    padding: 0 5px;
    list-style: none;
    position: relative;
    display: list-item;
    box-sizing: border-box;
    border: 1px solid #dcdcdc;
    box-shadow: 0 5px 8px rgba(0, 0, 0, 0.2);
    &:before {
      content: '';
      display: inline-block;
      border-right: 7px solid transparent;
      border-bottom: 7px solid rgba(0, 0, 0, 0.2);
      border-left: 7px solid transparent;
    }
    &:after {
      content: '';
      display: inline-block;
      border-left: 6px solid transparent;
      border-right: 6px solid transparent;
      border-bottom: 6px solid #fff;
    }
    li {
      display: block;
      a {
        color: #676767
        text-decoration: none;
        padding: 7px 11px;
        &:hover {
          background: #f6f6f6;
        }
      }
    }
  }
}

Update the lookup items styling.
Update the lookup items styling.
