Examine source code of Colorful_Holi

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#b2e0a2",
      "tab_background_text": "#0a0101"
    }
  },
  "version": "2.0",
  "name": "Colorful_Holi",
  "manifest_version": 2,
  "description": "Holi is festival of colors, so this colors embrace this theme to world."
}