Examine source code of Relaxed Blueish

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blueish",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(28, 59, 74)",
      "toolbar_text": "rgb(218, 223, 227)",
      "frame": "rgb(2, 29, 47)",
      "tab_background_text": "rgb(102, 154, 158)",
      "toolbar_field": "rgb(7, 18, 23)",
      "toolbar_field_text": "rgb(225, 230, 238)",
      "tab_line": "rgb(12, 123, 131)",
      "popup": "rgb(7, 31, 68)",
      "popup_text": "rgb(231, 231, 240)",
      "tab_loading": "rgb(12, 123, 131)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a7ff165-65b6-4e89-8c4e-b2e1a4fc43f6}"
    }
  }
}