Examine source code of black equaliser no yellow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "black equaliser",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(3, 3, 3, 0.59)",
      "toolbar_text": "rgb(248, 251, 251)",
      "frame": "rgb(85, 37, 37)",
      "tab_background_text": "rgb(6, 254, 247)",
      "toolbar_field": "rgba(0, 255, 221, 0.2)",
      "toolbar_field_text": "rgb(248, 251, 251)",
      "tab_line": "rgb(5, 255, 222, 1)",
      "popup": "rgb(3, 3, 3)",
      "popup_text": "rgb(6, 254, 247)",
      "tab_loading": "rgb(5, 247, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e7712cdb-40b9-4b6c-b7e7-c67c5987a362}"
    }
  }
}