Examine source code of Dark Developer Theme

{
  "name": "Dark Developer Theme",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "blake-connally-373084-unsplash.jpg"
    },
    "colors": {
      "toolbar": "rgba(3, 3, 3, 0.33)",
      "toolbar_field": "rgba(107, 102, 102, 0.32)",
      "toolbar_field_text": "rgba(0, 0, 0, 0.26)",
      "frame": "rgba(29, 33, 41, 0.39)",
      "tab_background_text": "rgba(204, 196, 196, 1)",
      "bookmark_text": "rgba(173, 173, 173, 1)"
    }
  }
}