Examine source code of Better dracula

{
  "name": "Better dracula",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "method-draw-image.svg"
    },
    "colors": {
      "frame": "rgba(40, 42, 54, 1)",
      "tab_background_text": "rgba(248, 248, 242, 1)",
      "toolbar": "rgba(68, 71, 90, 1)",
      "bookmark_text": "rgba(248, 248, 242, 1)",
      "toolbar_field": "rgba(40, 42, 54, 1)",
      "toolbar_field_text": "rgba(248, 248, 242, 1)"
    }
  }
}