Examine source code of SPAIN RETRO

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SPAIN RETRO",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-029-cc9cab928c1799136d18758709e91ecc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(229, 7, 10)",
      "toolbar_text": "rgb(240, 243, 0)",
      "frame": "rgb(198, 14, 16)",
      "tab_background_text": "rgb(240, 243, 0)",
      "toolbar_field": "rgba(229, 7, 10, 0.43)",
      "toolbar_field_text": "rgb(240, 243, 0)",
      "tab_line": "rgb(255, 238, 0)",
      "popup": "rgb(255, 24, 0)",
      "popup_text": "rgb(240, 243, 0)",
      "tab_loading": "rgb(255, 238, 0)"
    }
  }
}