Examine source code of simple-lite

{
  "name": "simple-lite",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(245, 245, 247, 1)",
      "tab_background_text": "rgba(141, 144, 149, 1)",
      "toolbar": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(235, 239, 242, 1)"
    }
  }
}