Examine source code of Poly Purple

{
  "manifest_version": 2,
  "version": "2.3",
  "name": "Poly Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "frame": "rgb(64, 64, 64)",
      "frame_inactive": "rgb(96, 96, 96)",
      "icons": "rgb(230, 230, 230)",
      "icons_attention": "rgb(103, 0, 221)",
      "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(43, 32, 139)",
      "toolbar_field_highlight": "rgb(173, 112, 232)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(40, 40, 40)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(36, 36, 36)",
      "popup_highlight": "rgb(91, 50, 175)",
      "ntp_background": "rgb(16, 16, 16)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(36, 36, 36)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(36, 36, 36)",
      "sidebar_highlight": "rgb(73, 42, 158)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  }
}