Examine source code of purple_lightning

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "purple lightning",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-044-d348b7b42f4790e561202cad5e15d3e6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(66, 50, 118)",
      "toolbar_text": "rgb(254, 254, 254)",
      "frame": "rgb(30, 39, 44)",
      "tab_background_text": "rgb(206, 206, 206)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(55, 58, 116)",
      "tab_line": "rgb(215, 195, 236)",
      "popup": "rgb(126, 94, 154)",
      "popup_text": "rgb(228, 228, 231)",
      "tab_loading": "rgb(215, 195, 236)"
    }
  }
}