Examine source code of WierdColors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "WierdColors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-004-411c27df18d2f86bd8790aa4a1bde85f.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(20, 135, 198)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(29, 43, 43)",
      "tab_background_text": "rgb(5, 221, 47)",
      "toolbar_field": "rgb(54, 105, 134)",
      "toolbar_field_text": "rgb(255, 179, 0)",
      "tab_line": "rgb(255, 21, 0)",
      "popup": "rgb(59, 126, 151)",
      "popup_text": "rgb(17, 20, 83)",
      "tab_loading": "rgb(255, 21, 0)"
    }
  }
}