.nvd3 .nv-legend .nv-disabled rect {
    /*fill-opacity: 0;*/
}

.nvd3 .nv-check-box .nv-box {
    fill-opacity:0;
    stroke-width:2;
}

.nvd3 .nv-check-box .nv-check {
    fill-opacity:0;
    stroke-width:4;
}

.nvd3 .nv-series.nv-disabled .nv-check-box .nv-check {
    fill-opacity:0;
    stroke-opacity:0;
}

.nvd3 .nv-controlsWrap .nv-legend .nv-check-box .nv-check {
    opacity: 0;
}