Examine source code of Leno

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Leno",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(45, 45, 45)",
      "toolbar_text": "rgb(241, 241, 241)",
      "frame": "rgb(22, 89, 13)",
      "tab_background_text": "rgb(195, 195, 195)",
      "toolbar_field": "rgb(45, 45, 45)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 180, 117)",
      "popup": "rgba(14, 14, 14, 0.81)",
      "popup_text": "rgb(231, 231, 234)",
      "button_background_active": "rgb(157, 106, 58)",
      "button_background_hover": "rgb(208, 140, 76)",
      "frame_inactive": "rgb(34, 191, 51)",
      "icons": "rgb(217, 213, 209)",
      "ntp_background": "rgb(28, 28, 28)",
      "popup_border": "rgb(40, 165, 54)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(40, 165, 54)",
      "sidebar_border": "rgb(40, 165, 54)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(245, 180, 117)",
      "tab_loading": "rgb(245, 180, 117)"
    }
  }
}