Examine source code of Peaceful Sage

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Peaceful Sage",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(228, 240, 212)",
      "toolbar_text": "rgb(42, 74, 16)",
      "frame": "rgb(228, 240, 212)",
      "tab_background_text": "rgb(59, 109, 17)",
      "toolbar_field": "rgb(249, 252, 246)",
      "toolbar_field_text": "rgb(42, 74, 16)",
      "tab_line": "rgb(74, 122, 30)",
      "popup": "rgb(242, 247, 236)",
      "popup_text": "rgb(42, 74, 16)",
      "button_background_active": "rgb(138, 189, 90)",
      "button_background_hover": "rgb(168, 202, 136)",
      "frame_inactive": "rgb(184, 207, 156)",
      "icons_attention": "rgb(74, 122, 30)",
      "icons": "rgb(59, 109, 17)",
      "ntp_background": "rgb(228, 240, 212)",
      "ntp_text": "rgb(42, 74, 16)",
      "popup_border": "rgb(123, 175, 68)",
      "popup_highlight_text": "rgb(42, 74, 16)",
      "popup_highlight": "rgb(200, 221, 176)",
      "sidebar_border": "rgb(138, 189, 90)",
      "sidebar_highlight_text": "rgb(42, 74, 16)",
      "sidebar_highlight": "rgb(200, 221, 176)",
      "sidebar_text": "rgb(42, 74, 16)",
      "sidebar": "rgb(237, 246, 224)",
      "tab_background_separator": "rgb(168, 202, 136)",
      "tab_loading": "rgb(123, 175, 68)",
      "tab_selected": "rgb(242, 247, 236)",
      "tab_text": "rgb(42, 74, 16)",
      "toolbar_bottom_separator": "rgb(168, 202, 136)",
      "toolbar_field_border_focus": "rgb(74, 122, 30)",
      "toolbar_field_border": "rgb(123, 175, 68)",
      "toolbar_field_focus": "rgb(242, 247, 236)",
      "toolbar_field_highlight_text": "rgb(42, 74, 16)",
      "toolbar_field_highlight": "rgb(200, 221, 176)",
      "toolbar_field_separator": "rgb(168, 202, 136)",
      "toolbar_field_text_focus": "rgb(42, 74, 16)",
      "toolbar_vertical_separator": "rgb(168, 202, 136)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b284296-1b9c-433a-849d-db464c9e432a}"
    }
  }
}