Examine source code of greenlight blend

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#4c6b50",
      "tab_background_text": "#2dc43f"
    }
  },
  "version": "2.0",
  "name": "greenlight blend",
  "manifest_version": 2,
  "description": "a basic theme for people who like the color GREEN"
}