Examine source code of 16-bit night

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "16-bit night",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 15, 59)",
      "toolbar_text": "rgba(254, 198, 91, 0.9)",
      "frame": "rgb(7, 15, 59)",
      "tab_background_text": "rgb(254, 198, 91)",
      "toolbar_field": "rgba(254, 198, 91, 0.29)",
      "toolbar_field_text": "rgb(254, 198, 91)",
      "tab_line": "rgba(254, 198, 91, 0.9)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(254, 198, 91)",
      "tab_loading": "rgba(254, 198, 91, 0.9)"
    }
  }
}