Examine source code of Valentine Hearts

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Valentine Hearts",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(165, 0, 71, 0.03)",
      "toolbar_field": "rgba(227, 192, 207, 0)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 68, 149)",
      "popup": "rgb(227, 192, 207)",
      "popup_text": "rgb(165, 0, 71)",
      "tab_loading": "rgb(255, 68, 149)",
      "bookmark_text": "rgb(165, 0, 71)",
      "frame": "rgb(227, 192, 207)",
      "tab_background_text": "rgb(82, 0, 35)"
    }
  }
}