.checkbox_box>input#travel_calc_form\:alreadyTraveling:checked + label::before {
    border: 1px solid #003791;
    background-color: #003791;
    border-radius: 5px;
}

.checkbox_box>input#travel_calc_form\:alreadyTraveling + label::before{
    border: 1px solid #003791;
    border-radius: 5px;
}