Examine source code of 潤羽るしあ Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Rushia",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(67, 45, 215)",
      "frame": "rgb(87, 170, 166)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(12, 99, 174)",
      "tab_line": "rgb(255, 219, 74)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(255, 219, 74)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9dc6ee5-c219-4ae3-8cec-627ca0a99830}"
    }
  }
}