Examine source code of Yellow pizza theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Yellowpizzatheme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-027-1049af643fc55b4ffd4a8575444547c5.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(6, 241, 31, 0.64)",
      "toolbar_text": "rgb(0, 187, 255)",
      "frame": "rgb(221, 249, 118)",
      "tab_background_text": "rgb(218, 0, 5)",
      "toolbar_field": "rgba(24, 219, 47, 0.36)",
      "toolbar_field_text": "rgb(252, 0, 61)",
      "tab_line": "rgb(131, 127, 173)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(5, 124, 167)",
      "icons_attention": "rgb(171, 160, 223)",
      "tab_loading": "rgb(131, 127, 173)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f021a8d7-059f-4c22-b0b5-57e453503b08}"
    }
  }
}