Hello,

Please add this code to the Theme Settings > Custom CSS > Global:

.swatch-on-single.swatch-enabled {
	border:2px solid transparent;
	padding:5px 7px;
}
.swatch-on-single.swatch-enabled:hover {
	border:2px solid #333333;
	padding:5px 7px;
}
.woodmart-swatch.text-only:after {
    display:none;
}

Best Regards