Examine source code of retro neon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "retro neon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(4, 1, 18)",
      "toolbar_text": "rgb(42, 19, 155)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(105, 0, 125)",
      "toolbar_field": "rgb(33, 1, 46)",
      "toolbar_field_text": "rgb(148, 5, 205)",
      "tab_line": "rgb(248, 0, 234)",
      "popup": "rgb(3, 1, 13)",
      "popup_text": "rgb(42, 19, 155)",
      "button_background_active": "rgb(41, 25, 124)",
      "button_background_hover": "rgb(42, 19, 155)",
      "icons_attention": "rgb(69, 33, 241)",
      "icons": "rgb(148, 5, 205)",
      "ntp_background": "rgb(8, 5, 25)",
      "ntp_text": "rgb(10, 2, 67)",
      "tab_loading": "rgb(248, 0, 234)"
    }
  }
}