.js-product .t-product__option-variants_buttons .t-product__option-checkmark_color {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 50%;
    height: 40px;
    width: 40px;
}

.js-product .t-product__option-variants_custom .t-product__option-item.t-product__option-item_disabled {
    opacity: .1;
}