Examine source code of Dark for Developer

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark for Developer",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(24, 24, 37)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgba(255, 255, 255, 0.76)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 255, 255)",
      "popup": "rgba(255, 255, 255, 0.96)",
      "popup_text": "rgb(24, 24, 37)",
      "ntp_background": "rgb(24, 24, 37)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(0, 0, 0)",
      "tab_loading": "rgb(0, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cb490b5a-c1ca-4489-8fa3-978236127671}"
    }
  }
}