Examine source code of Autumn Grass

{
  "name": "Autumn Grass",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "autumngrass.png"
    },
    "colors": {
      "frame": "rgba(184, 166, 128, 1)",
      "tab_background_text": "rgba(0, 0, 0, 0.67)",
      "toolbar": "rgba(204, 183, 138, 0.55)",
      "bookmark_text": "rgba(31, 31, 31, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.63)",
      "toolbar_field_text": "rgba(31, 31, 31, 1)"
    }
  }
}