Add This Css In your edit Code > Style.css File
.swatch_options input:checked+.swatch-element {
background: #000;
color: #fff;
}
Main issue: In the Turbo theme, the selected swatch/variant should display a black background with white text, instead of only a darkened border.
Proposed fix (CSS):
Notes:
Status/outcome:
Add This Css In your edit Code > Style.css File
.swatch_options input:checked+.swatch-element {
background: #000;
color: #fff;
}