Examine source code of Asexual Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ace Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-034-e0dfa84411058d2e5627f19f1ea501ca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(163, 163, 163)",
      "toolbar_text": "rgb(128, 0, 128)",
      "frame": "rgb(128, 0, 128)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(128, 0, 128)",
      "popup_text": "rgb(163, 163, 163)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9e87d3da-f860-420c-af82-59eb9995d9cc}"
    }
  }
}