Examine source code of SJ 2020

{
  "name": "SJ 2020",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "SJ A2.PNG"
    },
    "colors": {
      "frame": "rgba(0, 37, 154, 1)",
      "tab_background_text": "rgba(185, 199, 247, 1)",
      "toolbar": "rgba(0, 36, 153, 0.41)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(117, 149, 255, 1)",
      "toolbar_field_text": "rgba(0, 25, 105, 1)"
    }
  }
}