Examine source code of Color electric

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Color electric",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(230, 230, 230, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 67, 194)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 26, 164)",
      "tab_line": "rgb(255, 208, 0)",
      "popup": "rgb(230, 230, 230)",
      "popup_text": "rgb(0, 88, 174)",
      "ntp_background": "rgb(255, 182, 74)",
      "ntp_text": "rgb(140, 0, 255)",
      "popup_border": "rgb(255, 152, 0)",
      "tab_loading": "rgb(255, 208, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{297dea2b-a956-41cf-b90f-6b3eb2c47561}"
    }
  }
}