superset2/superset/assets/visualizations/nvd3_vis.css

g.superset path {
   stroke-dasharray: 5, 5;
}

.nvtooltip tr.highlight td {
  font-weight: bold;
  font-size: 15px !important;
}

text.nv-axislabel {
  font-size: 14px;
}

.slice_container.dist_bar {
  overflow-x: auto !important;
}

.dist_bar svg.nvd3-svg {
  width: auto;
  font-size: 14px;
}

.nv-x text{
  font-size: 12px;
}

.bar {
  overflow-x: auto !important;
}

.bar svg.nvd3-svg {
  width: auto;
}

text.nv-axislabel {
  font-size: 14px !important;
}

g.solid path, line.solid {
  stroke-dasharray: unset;
}

g.dashed path, line.dashed {
  stroke-dasharray: 5, 5;
}

g.longDashed path, line.longDashed {
  stroke-dasharray: 10, 2;
}

g.dotted path, line.dotted {
  stroke-dasharray: 1, 1;
}

g.opacityLow path, line.opacityLow {
  stroke-opacity: .2
}

g.opacityMedium path, line.opacityMedium {
  stroke-opacity: .5
}

g.opacityHigh path, line.opacityHigh {
  stroke-opacity: .8
}