Examine source code of Kuromi.Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Kuromi.Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(181, 168, 187)",
      "toolbar_text": "rgb(119, 110, 155)",
      "frame": "rgb(165, 155, 179)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(230, 227, 236)",
      "toolbar_field_text": "rgb(99, 92, 130)",
      "tab_line": "rgb(137, 129, 174)",
      "popup": "rgb(209, 200, 221)",
      "popup_text": "rgb(99, 92, 130)",
      "tab_loading": "rgb(137, 129, 174)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd7c5dd4-03e4-498f-8baa-90e426b68868}"
    }
  }
}