Examine source code of Trialdd black

{
  "theme": {
    "images": {
      "theme_frame": "sd.jpg"
    },
    "colors": {
      "frame": "#dbd7d7",
      "tab_background_text": "#c0c0db"
    }
  },
  "version": "2.0",
  "name": "Trialdd black",
  "manifest_version": 2,
  "description": "trying for first time"
}