Examine source code of Subtle Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Subtle Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(48, 48, 69)",
      "toolbar_text": "rgb(45, 108, 196)",
      "frame": "rgb(0, 0, 24)",
      "tab_background_text": "rgb(61, 103, 155)",
      "toolbar_field": "rgb(33, 33, 64)",
      "toolbar_field_text": "rgb(59, 149, 254)",
      "tab_line": "rgb(42, 84, 183)",
      "popup": "rgb(45, 50, 96)",
      "popup_text": "rgb(59, 122, 196)",
      "button_background_active": "rgb(67, 76, 169)",
      "button_background_hover": "rgb(74, 83, 199)",
      "frame_inactive": "rgb(21, 24, 99)",
      "icons_attention": "rgb(100, 110, 250)",
      "icons": "rgb(101, 108, 173)",
      "ntp_background": "rgb(7, 9, 50)",
      "ntp_text": "rgb(90, 101, 203)",
      "popup_border": "rgb(34, 39, 161)",
      "popup_highlight_text": "rgb(81, 93, 211)",
      "popup_highlight": "rgb(19, 22, 212)",
      "sidebar_border": "rgb(87, 98, 208)",
      "sidebar_highlight_text": "rgb(70, 72, 219)",
      "sidebar_highlight": "rgb(84, 94, 204)",
      "sidebar_text": "rgb(68, 70, 212)",
      "tab_loading": "rgb(42, 84, 183)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8759d085-70ba-4ff7-9a8c-16098d7f1d29}"
    }
  }
}