Examine source code of Sushi Cats

{
  "name": "Sushi Cats",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Sushi Cats.png"
    },
    "colors": {
      "frame": "rgba(253, 181, 203, 1)",
      "tab_background_text": "rgba(176, 55, 75, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(176, 55, 75, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.35)",
      "toolbar_field_text": "rgba(176, 55, 75, 1)",
      "tab_line": "rgba(76, 150, 130, 1)"
    }
  }
}