.has-error .form-control {
    border-color: #b94a48 !important;
}

.has-error .select2-selection {
    border-color: #b94a48 !important;
}

.has-error .input-group-text {
    border-color: #b94a48 !important;
    background: #f2dede !important;
    color: #b94a48;
}
.input-group > .select2-container {
    width: auto !important;
    flex: 1 1 auto !important;
} 
.parsley-error .input-group .input-group-text {
    border-color: #b94a48 !important;
    background: #f2dede !important;
    color: #b94a48;
}