Examine source code of Photon Dark Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Photon Dark",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 70, 115)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(153, 153, 153, 0.2)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(39, 31, 255)",
      "popup": "rgb(0, 66, 113)",
      "popup_text": "rgb(255, 248, 251)",
      "tab_loading": "rgb(39, 31, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d5db59b-fa94-48d7-bbed-ca9aabf9c0b4}"
    }
  }
}