nvd3/src/css/bars.css

A reusable charting library written in d3.js

.nvd3 .nv-bars rect {
    fill-opacity: .75;

    transition: fill-opacity 250ms linear;
}

.nvd3 .nv-bars rect.hover {
    fill-opacity: 1;
}

.nvd3 .nv-bars .hover rect {
    fill: lightblue;
}

.nvd3 .nv-bars text {
    fill: rgba(0,0,0,0);
}

.nvd3 .nv-bars .hover text {
    fill: rgba(0,0,0,1);
}

.nvd3 .nv-multibar .nv-groups rect,
.nvd3 .nv-multibarHorizontal .nv-groups rect,
.nvd3 .nv-discretebar .nv-groups rect {
    stroke-opacity: 0;

    transition: fill-opacity 250ms linear;
}

.nvd3 .nv-multibar .nv-groups rect:hover,
.nvd3 .nv-multibarHorizontal .nv-groups rect:hover,
.nvd3 .nv-candlestickBar .nv-ticks rect:hover,
.nvd3 .nv-discretebar .nv-groups rect:hover {
    fill-opacity: 1;
}

.nvd3 .nv-discretebar .nv-groups text,
.nvd3 .nv-multibarHorizontal .nv-groups text {
    font-weight: bold;
    fill: rgba(0,0,0,1);
    stroke: rgba(0,0,0,0);
}