Examine source code of Space orange mode

{
  "name": "Space orange mode",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "sans-titre.png"
    },
    "colors": {
      "frame": "rgba(166, 75, 227, 0)",
      "tab_background_text": "rgba(255, 85, 0, 1)",
      "toolbar": "rgba(117, 85, 54, 0)",
      "bookmark_text": "rgba(255, 77, 0, 1)",
      "toolbar_field": "rgba(255, 81, 0, 0)",
      "toolbar_field_text": "rgba(255, 77, 0, 1)"
    }
  }
}