Examine source code of Poly Indigo

{
  "manifest_version": 2,
  "version": "5.2",
  "name": "Poly Indigo",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "frame": "rgb(36, 36, 36)",
      "frame_inactive": "rgb(72, 72, 72)",
      "icons": "rgb(230, 230, 230)",
      "icons_attention": "rgb(165, 78, 206)",
      "toolbar": "rgba(0, 0, 0, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0.5)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.5)",
      "toolbar_field": "rgba(255, 255, 255, 0.5)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "toolbar_field_separator": "rgba(255, 255, 255, 0.25)",
      "toolbar_field_border_focus": "rgb(135, 65, 216)",
      "toolbar_field_highlight": "rgb(54, 21, 110)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(32, 32, 32)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(32, 32, 32)",
      "popup_highlight": "rgb(75, 44, 153)",
      "ntp_background": "rgb(12, 12, 12)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(32, 32, 32)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(32, 32, 32)",
      "sidebar_highlight": "rgb(81, 29, 186)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(145, 102, 255, 0.)"
    }
  }
}