Examine source code of Light Nebula

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "BlueNebula",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(34, 66, 90)",
      "toolbar_text": "rgb(38, 224, 213)",
      "frame": "rgb(34, 66, 90)",
      "tab_background_text": "rgb(39, 191, 216)",
      "toolbar_field": "rgba(68, 11, 205, 0.34)",
      "toolbar_field_text": "rgb(53, 235, 205)",
      "tab_line": "rgb(53, 192, 140)",
      "popup": "rgb(15, 49, 90)",
      "popup_text": "rgb(44, 201, 197)",
      "tab_loading": "rgb(53, 192, 140)"
    }
  }
}