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Please put these CSS codes into your theme:
WP Dashboard > Appearance > Customize > Custom CSS:
.cart-order-details input[type='radio']:after {
width: 15px;
height: 15px;
border-radius: 100%;
top: -2px;
left: -1px;
position: relative;
background-color: #ffffff;
content: '';
display: inline-block;
visibility: visible;
border: 2px solid #332d45;
}
.cart-order-details input[type='radio']:checked:after {
width: 15px;
height: 15px;
border-radius: 100%;
top: -2px;
left: -1px;
position: relative;
background-color: #d31816;
content: '';
display: inline-block;
visibility: visible;
border: 2px solid #d31816;
}
Please keep me posted.
Regards