Examine source code of Orange Mat Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Orange Theme",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(32, 33, 36, 0.25)",
      "toolbar_text": "rgb(255, 189, 65)",
      "frame": "rgb(32, 33, 36)",
      "tab_background_text": "rgb(128, 128, 128)",
      "toolbar_field": "rgba(48, 49, 52, 0.95)",
      "toolbar_field_text": "rgba(255, 189, 65, 0.75)",
      "tab_line": "rgba(32, 33, 36, 0.25)",
      "popup": "rgb(40, 41, 45)",
      "popup_text": "rgba(255, 255, 255, 0.75)",
      "ntp_background": "rgb(32, 33, 36)",
      "ntp_text": "rgba(255, 189, 65, 0.5)",
      "popup_border": "rgb(40, 41, 45)",
      "sidebar_border": "rgb(48, 49, 52)",
      "sidebar": "rgb(48, 49, 52)",
      "tab_selected": "rgb(39, 41, 41)",
      "tab_loading": "rgba(32, 33, 36, 0.25)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b5294a59-f118-4daa-863d-9d44cc5ea42e}"
    }
  }
}