Examine source code of Raichu (Polygonal)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Raichu (Polygonal)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(229, 210, 236, 0.27)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(245, 245, 164)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 15, 1)",
      "tab_line": "rgb(252, 248, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 15, 1)",
      "tab_loading": "rgb(252, 248, 0)"
    }
  }
}