Examine source code of black n green theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(34, 255, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(71, 255, 62)",
      "toolbar_field": "rgb(23, 23, 23)",
      "toolbar_field_text": "rgb(0, 255, 0)",
      "tab_line": "rgba(13, 255, 0, 0.36)",
      "popup": "rgb(4, 4, 4)",
      "popup_text": "rgb(70, 255, 61)",
      "button_background_active": "rgba(12, 255, 0, 0.16)",
      "button_background_hover": "rgba(7, 255, 0, 0.12)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgba(13, 255, 0, 0.36)",
      "icons": "rgb(34, 255, 0)",
      "ntp_background": "rgba(0, 0, 0, 0.91)",
      "popup_border": "rgb(0, 0, 0)",
      "popup_highlight_text": "rgb(144, 255, 117)",
      "toolbar_field_highlight": "rgba(47, 255, 0, 0.33)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(7, 255, 0, 0.32)",
      "toolbar_vertical_separator": "rgb(255, 255, 255)",
      "tab_loading": "rgba(13, 255, 0, 0.36)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5df041c4-ecb0-4200-8ee9-d0a2af01d154}"
    }
  }
}