Examine source code of Spring Doodles

{
  "name": "Spring Doodles",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "IMG_20200402_231516.JPG"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 0.13)",
      "tab_background_text": "rgba(36, 35, 94, 0.65)",
      "toolbar": "rgba(82, 212, 89, 0.47)",
      "bookmark_text": "rgba(83, 122, 214, 1)",
      "toolbar_field": "rgba(71, 186, 174, 1)",
      "toolbar_field_text": "rgba(19, 115, 37, 1)"
    }
  }
}