Hello,
Try to add this code to Global custom css area in Theme Settings
div.cart-collaterals .cart_totals table .shipping a {
color: #ffffff!important;
background-color:#17aa99!important;
font-size: 12px;
line-height:16px;
padding: 10px 14px;
display: inline-block;
position: relative;
font-weight: 600;
text-align: center;
text-transform: uppercase;
letter-spacing: .3px;
border-radius: 0;
border-width: 0;
border-style: solid;
border-color: transparent;
outline:none;
box-shadow: none;
text-shadow:none;
text-decoration: none;
vertical-align: middle;
cursor: pointer;
-webkit-transition:
color 0.25s ease,
background-color 0.25s ease,
border-color 0.25s ease,
box-shadow 0.25s ease,
opacity 0.25s ease;
transition:
color 0.25s ease,
background-color 0.25s ease,
border-color 0.25s ease,
box-shadow 0.25s ease,
opacity 0.25s ease;
}
div.cart-collaterals .cart_totals table .shipping a:hover {
color: #ffffff!important;
background-color:#0c8879!important;
}
Kind Regards
XTemos Studio