Examine source code of BLACK Red Blue Lime

{
  "name": "BLACK",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "BLACK.PNG"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(0, 77, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(0, 255, 119, 1)",
      "tab_line": "rgba(0, 255, 119, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{59fb8ddf-a830-47b1-9ad4-a8407fced777}"
    }
  }
}