Examine source code of Gray_Green_White

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gray_Green_White",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(56, 56, 56)",
      "toolbar_text": "rgb(251, 251, 254)",
      "frame": "rgb(48, 48, 48)",
      "tab_background_text": "rgb(128, 128, 128)",
      "toolbar_field": "rgb(64, 64, 64)",
      "toolbar_field_text": "rgb(251, 251, 254)",
      "tab_line": "rgb(142, 167, 117)",
      "popup": "rgb(56, 56, 56)",
      "popup_text": "rgb(128, 128, 128)",
      "button_background_active": "rgb(112, 112, 112)",
      "button_background_hover": "rgb(142, 167, 117)",
      "icons_attention": "rgb(251, 251, 254)",
      "icons": "rgb(251, 251, 254)",
      "ntp_background": "rgb(64, 64, 64)",
      "ntp_text": "rgb(251, 251, 254)",
      "popup_border": "rgb(112, 112, 112)",
      "tab_selected": "rgb(56, 56, 56)",
      "tab_text": "rgb(251, 251, 254)",
      "toolbar_bottom_separator": "rgb(48, 48, 48)",
      "toolbar_field_border_focus": "rgb(64, 64, 64)",
      "toolbar_field_border": "rgb(48, 48, 48)",
      "toolbar_field_focus": "rgb(48, 48, 48)",
      "toolbar_field_highlight_text": "rgb(251, 251, 254)",
      "toolbar_field_highlight": "rgb(142, 167, 117)",
      "toolbar_field_text_focus": "rgb(251, 251, 254)",
      "toolbar_top_separator": "rgb(64, 64, 64)",
      "tab_loading": "rgb(142, 167, 117)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6859d4b7-5b67-42ba-9ab0-fe523e3c5a15}"
    }
  }
}