r2c/user/themes/r2c/css/styles_3djs.css

.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}

/* .nodes text{
  display: block;
} */
.nodes text {
  -webkit-user-select: none!important;
     -moz-user-select: none!important;
      -ms-user-select: none!important;
          user-select: none!important;
  cursor: -webkit-pointer;
  cursor: pointer;
}

.nodes text.group1{
  fill:black;
}
.nodes text.group2{
  fill:grey;
}
.nodes text.group3{
  fill:lightgrey;
}