Examine source code of sumikkowallpaper

{
  "name": "sumikkowallpaper",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2018-10-13 at 3.41.22 PM.png"
    },
    "colors": {
      "toolbar_field_text": "rgba(0, 0, 0, 0)",
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(0, 0, 0, 0)"
    }
  }
}