Examine source code of Minecraft Dark theme

{
  "manifest_version" : 3 ,
  "name" : "Minecraft Deep Dark",
  "version" : "1.2",
  "description" : "A dark Minecraft-themed experience for adventurers.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf1e1c5c-7f48-422a-b912-d457f31c54e5}",
      "strict_min_version": "109.0"
    }
  },
  "theme": {
    "images": {
      "theme_frame": "background.png"
    },
    "properties": {
      "ntp_background_alignment": "center top",
      "ntp_background_repeat": "no-repeat"
    },
    "colors": {
      "frame": "#1a1a1a",
      "tab_background_text": "#f0f0f0",
      "toolbar": "#313131",
      "bookmark_text": "#f0f0f0",
      "toolbar_field": "#1a1a1a",
      "toolbar_field_text": "#3fb33f",
      "toolbar_top_separator": "#555555",
      "ntp_background": "#1a1a1a",
      "ntp_text": "#f0f0f0",
      "tab_line": "#d4af37",
      "tab_selected": "#4a4a4a"
    }
  }
}