index.css

a.bbref-chart-link[href],
a.bbref-chart-link[href]:visited {
  font-size: 12px;
  color: #333;
  font-weight: bold;
  text-decoration: none;
  background: -webkit-linear-gradient(#f7f7f7, #ddd);
  padding: 1px 6px;
  border-radius: 2px;
  border: 1px solid #ccc;
}

a.bbref-chart-link[href]:before {
  content: "☷";
  font-size: 14px;
  vertical-align: text-top;
  line-height: 100%;
  margin-right: 3px;
}

svg.bbref-chart g.bar rect {
  fill: green;
  fill-opacity: 0.5;
  stroke: green;
  stroke-width: 1px;
  shape-rendering: crispEdges;
}

svg.bbref-chart g.bar:hover rect {
  fill: purple;
  stroke: purple;
}

svg.bbref-chart g.bar:hover text {
  fill: dodgerblue;
}

svg.bbref-chart .axis text {
  fill: #777;
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-size: 12px;
}

svg.bbref-chart .x.axis text {
  font-size: 10px;
}

svg.bbref-chart .barlabel {
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-weight: bold;
  font-size: 11px;
  fill: #444;
}

svg.bbref-chart .axis line {
  stroke: #eee;
  stroke-width: 1px;
}

svg.bbref-chart path.domain {
  display: none;
}

svg.bbref-chart .average {
  fill: none;
  stroke-width: 2px;
  stroke-dasharray: 6 2;
  stroke: #1E90FF;
}