.swatch-attribute .swatch-attribute-options .swatch-option.disabled,
.swatch-attribute .swatch-attribute-options .swatch-option.out-of-stock {
  opacity: 0.3 !important;
  cursor: pointer !important;
  pointer-events: all !important;
}
.swatch-attribute .swatch-attribute-options .swatch-option.disabled:after,
.swatch-attribute .swatch-attribute-options .swatch-option.out-of-stock:after {
  content: "";
  display: none;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  background: linear-gradient(to right top, transparent, transparent 48%, #ff0000 49%, #ff0000 50%, transparent 51%, transparent) !important;
}
#contact_form_notify h4 {
  color: red;
}