.product .skuProperty .elementSkuAvailable .skuPropertyLink {
    border: 1px solid green;
}
.product .skuProperty .elementSkuAvailable.selected .skuPropertyLink {
    background-color: aliceblue;
}
.product .skuProperty .elementSkuNotAvailable.selected .skuPropertyLink {
    background-color: aliceblue;
}