Examine source code of MexicaliMix

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "MexicaliMix",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_field": "rgba(138, 138, 240, 0)",
      "toolbar_field_text": "rgb(250, 0, 3)",
      "tab_line": "rgb(233, 243, 9)",
      "popup": "rgb(113, 173, 203)",
      "popup_text": "rgb(239, 221, 96)",
      "tab_loading": "rgb(233, 243, 9)",
      "bookmark_text": "rgb(189, 243, 250)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(243, 103, 93)"
    }
  }
}