Examine source code of Blue Darker Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Dark Theme",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(35, 86, 205)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(35, 86, 205)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f972096-3d9f-4ad7-a37e-7c67c576a506}"
    }
  }
}