Hello,

The below code will help you to add the border to the swatches. Enter it into the “Global Custom CSS” area in Theme Settings -> Custom CSS.

.wd-swatch:after {
	display: none;
}

.wd-swatch.swatch-with-bg {
	border: 2px solid #FFF;
	box-shadow: 0 0 0 1px rgba(0,0,0,0.15);
}

.wd-swatch.swatch-with-bg.active-swatch {
	box-shadow: 0 0 0 1px #000;
}

.wd-swatch.swatch-with-bg:not(.active-swatch):hover {
	box-shadow: 0 0 0 1px rgba(0,0,0,0.4);
}

.wd-swatch:not(.swatch-with-bg) {
	border: 1px solid rgba(0,0,0,0.15);
	border-radius: 3px;
	padding: 4px;
}
.wd-swatch:not(.swatch-with-bg).active-swatch {
	border-color: #000;
}

.wd-swatch:not(.swatch-with-bg):not(.active-swatch):hover {
	border-color: rgba(0,0,0,0.4);
}

Kind Regards