Examine source code of Photon Dark Mode

{
  "name": "Photon Dark Mode",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "angryimg.png"
    },
    "colors": {
      "frame": "rgba(15, 17, 38, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(54, 57, 89, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(177, 177, 179, 1)",
      "toolbar_field_text": "rgba(15, 17, 38, 1)"
    }
  }
}