Examine source code of Night Owl Theme

{
  "name": "Night Owl Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot (200).png"
    },
    "colors": {
      "frame": "rgba(1, 22, 39, 1)",
      "tab_background_text": "rgba(210, 222, 231, 0.33)",
      "toolbar": "rgba(1, 22, 39, 1)",
      "bookmark_text": "rgba(210, 222, 231, 0.33)",
      "toolbar_field": "rgba(1, 17, 29, 1)",
      "toolbar_field_text": "rgba(210, 222, 231, 1)",
      "tab_line": "rgba(0, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{369e57d7-9acc-4c7e-bb96-331b94c2a8df}"
    }
  }
}