Examine source code of Abstract Shadow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "White shadow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-016-af8c49de75012ca2c007f953ff2e4499.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(27, 64, 123)",
      "toolbar_text": "rgb(151, 222, 191)",
      "frame": "rgb(20, 43, 54)",
      "tab_background_text": "rgb(65, 122, 116)",
      "toolbar_field": "rgb(24, 58, 83)",
      "toolbar_field_text": "rgba(187, 222, 199, 0.68)",
      "tab_line": "rgb(194, 48, 89)",
      "popup": "rgb(37, 56, 32)",
      "popup_text": "rgb(131, 131, 203)",
      "tab_loading": "rgb(194, 48, 89)"
    }
  }
}