Examine source code of Black Pixel Dark Mod

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pixel Fox FFColourMod",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(33, 33, 33, 0)",
      "toolbar_text": "rgb(252, 131, 2)",
      "frame": "rgb(21, 21, 21)",
      "tab_background_text": "rgb(252, 229, 2)",
      "toolbar_field": "rgba(0, 0, 0, 0.6)",
      "toolbar_field_text": "rgb(2, 134, 252)",
      "tab_line": "rgb(2, 134, 252)",
      "popup": "rgb(21, 21, 21)",
      "popup_text": "rgb(2, 134, 252)",
      "tab_loading": "rgb(2, 134, 252)"
    }
  }
}