new Cesium.Color(0.165, 0.165, 0.165, 0.8)
Cesium.Color.WHITE
Cesium.Color.RED.withAlpha(0.5)
Cesium.Color.fromCssColorString("#001aff")
Cesium.Color.fromCssColorString("rgba(254, 129, 6, 0.75)")
var color = Cesium.Color.fromRandom({
alpha: 0.5
});