Examine source code of xiao-theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "xiao",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-012-1e971c5fbb8dec3acbd76dd6c6819de9.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(19, 91, 60)",
      "toolbar_text": "rgb(146, 246, 156)",
      "frame": "rgb(7, 57, 36)",
      "tab_background_text": "rgb(146, 246, 156)",
      "toolbar_field": "rgb(186, 197, 162)",
      "toolbar_field_text": "rgb(6, 172, 102)",
      "tab_line": "rgb(6, 172, 102)",
      "popup": "rgb(6, 172, 102)",
      "popup_text": "rgb(146, 246, 156)",
      "tab_loading": "rgb(6, 172, 102)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d83f71a2-34a1-4c71-b5df-73974958c907}"
    }
  }
}