Exporting colors with bounding box in json

[Tortoise17]

I have seen this tool very user friendly. I want to ask that how can I export the bounding boxes with the colors as well as json file? I have used so far your demo file. But Cannot export the colors. If you can guide me for this (how to export bounding boxes with colors in json) would be great help.

[Tortoise17]

I have used demo example. I can see the bounding boxes. But I cannot see the way how to take the colors as well with bounding boxes to export.