Examine source code of Another Yellow Theme

{
  "name": "Another Yellow Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "yellow.lattice.2.I.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(61, 61, 61, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d92771f6-b276-4878-8477-b33c6c6b47d5}"
    }
  }
}