Examine source code of Joker Color Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Joker Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-044-2454b1459f8c4ee2e38d41030bf1580e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 198, 32)",
      "toolbar_text": "rgb(121, 31, 255)",
      "frame": "rgb(112, 2, 174)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(122, 15, 185)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(17, 236, 81)",
      "popup": "rgb(54, 147, 46)",
      "popup_text": "rgb(60, 214, 47)",
      "tab_loading": "rgb(17, 236, 81)"
    }
  }
}