Examine source code of Material Ocean

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Material-Ocean",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(15, 17, 26)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(15, 17, 26)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(15, 17, 26)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(66, 133, 244)",
      "popup": "rgb(15, 17, 26)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(66, 133, 244)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c3fe772-aff0-40cb-93af-b1a78b229757}"
    }
  }
}