Examine source code of Subtle but Neon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Subtle but Neon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-018-0ca3dfc7bb661ec53999d358812ce0ab.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(227, 242, 220, 0.73)",
      "toolbar_text": "rgb(243, 240, 237)",
      "frame": "rgb(35, 61, 80)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(86, 86, 95)",
      "tab_line": "rgb(79, 241, 215)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(104, 105, 109)",
      "frame_inactive": "rgb(118, 108, 99)",
      "icons": "rgba(7, 40, 119, 0.72)",
      "tab_selected": "rgb(215, 247, 47)",
      "tab_text": "rgb(67, 5, 57)",
      "tab_loading": "rgb(79, 241, 215)"
    }
  }
}