redoc/lib/components/MethodsList/methods-list.css

method {
  padding-bottom: 100px;
  display: block;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.methods {
  display: block;
  position: relative;;
}

.methods:before {
  content: "";
  background: rgb(59, 59, 105);
  height: 100%;
  width: 40%;
  top: 0;
  right: 0;
  position: absolute;
  z-index: -1;
}