Update bootstrap-switch.css

change

.has-switch label:hover,
.has-switch label:focus,
.has-switch label:active,
.has-switch label.active,
.has-switch label.disabled,
.has-switch label[disabled] {
  color: #ffffff;
  background-color: #e6e6e6;
  *background-color: #d9d9d9;
}

to

.has-switch label:hover,
.has-switch label:focus,
.has-switch label:active,
.has-switch label.active,
.has-switch label.disabled,
.has-switch label[disabled] {
  color: #000000;
  background-color: #e6e6e6;
  *background-color: #d9d9d9;
}