Examine source code of Boykisser - Dark Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Boykisser - Dark Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(100, 100, 100, 0.41)",
      "toolbar_text": "rgba(255, 255, 255, 0.85)",
      "frame": "rgb(17, 17, 17)",
      "tab_background_text": "rgb(206, 206, 206)",
      "toolbar_field": "rgba(29, 29, 29, 0.75)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.93)",
      "tab_line": "rgba(255, 255, 255, 0.82)",
      "popup": "rgba(49, 49, 49, 0.89)",
      "popup_text": "rgba(255, 255, 255, 0.86)",
      "button_background_active": "rgba(60, 60, 60, 0.71)",
      "button_background_hover": "rgba(90, 90, 90, 0.2)",
      "icons": "rgba(255, 255, 255, 0.9)",
      "ntp_text": "rgba(172, 172, 172, 0.92)",
      "tab_loading": "rgba(255, 255, 255, 0.82)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{20bcf519-00bb-4a9e-ad7e-36bb0b4370e7}"
    }
  }
}