Examine source code of Dark Colorful

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "colorful dark",
  "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(0, 229, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 157, 0)",
      "toolbar_field": "rgb(15, 21, 32)",
      "toolbar_field_text": "rgb(0, 255, 0)",
      "tab_line": "rgb(255, 0, 4)",
      "popup": "rgb(23, 23, 23)",
      "popup_text": "rgb(0, 255, 0)",
      "button_background_active": "rgb(33, 33, 33)",
      "button_background_hover": "rgb(14, 72, 0)",
      "icons": "rgb(28, 0, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(0, 255, 0)",
      "popup_border": "rgb(0, 0, 0)",
      "sidebar_text": "rgb(200, 255, 255)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_loading": "rgb(57, 57, 57)",
      "tab_selected": "rgb(0, 0, 0)",
      "tab_text": "rgb(146, 0, 255)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border": "rgb(129, 0, 112)",
      "toolbar_field_highlight": "rgb(220, 15, 15)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{07763f74-b941-42ce-b2bd-e8c2971927e5}"
    }
  }
}