Examine source code of Simple Dark Mode Theme

{
  "name": "sus amogus",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "sus.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(25, 25, 25, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(25, 25, 25, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(83, 83, 83, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f49d6b4-f2ed-4766-990e-648af6976829}"
    }
  }
}