Examine source code of oil banner

{
  "name": "oil banner",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "oilers banner.jpg"
    },
    "colors": {
      "frame": "rgba(15, 78, 214, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(224, 141, 16, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(9, 90, 240, 1)",
      "toolbar_field_text": "rgba(240, 136, 17, 1)"
    }
  }
}