Examine source code of my computer background

{
  "name": "cool theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "thumb-1920-423747_LI.jpg"
    },
    "colors": {
      "frame": "rgba(10, 40, 105, 1)",
      "tab_background_text": "rgba(94, 66, 66, 1)",
      "toolbar": "rgba(209, 58, 58, 1)",
      "bookmark_text": "rgba(173, 170, 128, 1)",
      "toolbar_field": "rgba(77, 62, 62, 1)",
      "toolbar_field_text": "rgba(128, 115, 18, 0.39)"
    }
  }
}