Get recolored billboard image

I create a point with a white icon and a red color and I need to save the resulting image or get base64 string. How can i get it?
billboard: {
image ‘./white-icon.png’,
color: Cesium.Color.RED


Welcome to the Cesium Community!

If I understand correctly, you want to save the red icon? Unfortunately we do not support this. The easiest way is probably to just use an image editing software to color your icon and then use it in your Cesium app.