Examine source code of Bars and Rainbow Balls

{
  "theme": {
    "images": {
      "theme_frame": "bars-and-rainbow-balls-header.jpg"
    },
    "colors": {
      "frame": "#0dff5a",
      "tab_background_text": "#0d0d0d"
    }
  },
  "version": "2.0",
  "name": "Bars and Rainbow Balls",
  "manifest_version": 2,
  "description": "Experiment with Illustrator object sprayer"
}