cesium/Source/Widgets/Timeline/lighter.css

Cesium is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

.cesium-lighter .cesium-timeline-bar {
    background: -moz-linear-gradient(top, #eeeeee 0%, #ffffff 50%, #fafafa 100%); /* FF3.6+ */
    background: -webkit-linear-gradient(top, #eeeeee 0%,#ffffff 50%,#fafafa 100%); /* Chrome10+,Safari5.1+ */
    background: linear-gradient(to bottom, #eeeeee 0%,#ffffff 50%,#fafafa 100%); /* W3C */
}

.cesium-lighter .cesium-timeline-ticLabel {
    color: #000;
}

.cesium-lighter .cesium-timeline-ticMain {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 1px;
    height: 50%;
    background: #000;
}

.cesium-lighter .cesium-timeline-ticSub {
    background: #444;
}