Examine source code of Irregular color scheme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Irregular color scheme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(169, 179, 90)",
      "toolbar_text": "rgb(37, 163, 16)",
      "frame": "rgb(179, 45, 221)",
      "tab_background_text": "rgb(169, 103, 120)",
      "toolbar_field": "rgb(82, 42, 180)",
      "toolbar_field_text": "rgb(89, 87, 43)",
      "tab_line": "rgb(221, 177, 84)",
      "popup": "rgb(57, 162, 81)",
      "popup_text": "rgb(55, 199, 185)",
      "tab_loading": "rgb(221, 177, 84)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{761ea065-f07d-4a2e-a8e6-4eddba63cdda}"
    }
  }
}