Examine source code of gold_black_flat

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "gold_black_flat",
  "theme": {
    "images": {
      "additional_backgrounds": []
    },
    "properties": {
      "additional_backgrounds_alignment": [],
      "additional_backgrounds_tiling": []
    },
    "colors": {
      "toolbar": "rgba(34, 28, 62, 0.96)",
      "toolbar_text": "rgb(193, 135, 60)",
      "frame": "rgb(8, 0, 47)",
      "tab_background_text": "rgb(193, 135, 60)",
      "toolbar_field": "rgb(8, 0, 47)",
      "toolbar_field_text": "rgb(193, 135, 60)",
      "tab_line": "rgb(255, 159, 0)",
      "popup": "rgba(9, 3, 34, 0.96)",
      "popup_text": "rgb(255, 159, 0)",
      "tab_loading": "rgb(255, 159, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dbd06220-8865-410c-a613-1105126f6e45}"
    }
  }
}