Examine source code of Summer Beach

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Summer Beach",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 98, 136)",
      "toolbar_text": "rgb(227, 255, 0)",
      "frame": "rgb(34, 38, 91)",
      "tab_background_text": "rgb(73, 215, 22)",
      "toolbar_field": "rgb(0, 252, 238)",
      "toolbar_field_text": "rgb(0, 12, 237)",
      "tab_line": "rgb(74, 255, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(74, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{23e5f948-00a0-42b0-ac0c-99a3b70b8d00}"
    }
  }
}