Examine source code of Neon Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Neon Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-006-51ab495c5f5dde6a3cddb22484acd00d.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(25, 25, 25)",
      "toolbar_text": "rgb(89, 247, 255)",
      "frame": "rgb(18, 18, 18)",
      "tab_background_text": "rgb(142, 255, 255)",
      "toolbar_field": "rgb(11, 11, 11)",
      "toolbar_field_text": "rgb(92, 207, 255)",
      "tab_line": "rgb(92, 247, 255)",
      "popup": "rgb(35, 35, 35)",
      "popup_text": "rgb(114, 255, 255)",
      "button_background_active": "rgba(93, 249, 255, 0.63)",
      "button_background_hover": "rgba(146, 248, 255, 0.62)",
      "frame_inactive": "rgb(60, 60, 60)",
      "icons_attention": "rgb(0, 240, 255)",
      "icons": "rgb(144, 255, 255)",
      "ntp_background": "rgb(43, 43, 43)",
      "sidebar_border": "rgb(129, 246, 255)",
      "tab_loading": "rgb(92, 247, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2b1c6866-f08a-4e20-b1b0-b6b53b2a5578}"
    }
  }
}