Examine source code of Spotify theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spotify theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-020-48c286b34e53380d46803c2e5603a5b2.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(108, 237, 98, 0.41)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(65, 189, 92)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(57, 236, 117)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(7, 100, 7)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(13, 103, 50)",
      "tab_loading": "rgb(7, 100, 7)"
    }
  }
}