Examine source code of Fresh Watercolors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 255, 234, 0.5)",
      "toolbar_text": "rgba(41, 0, 255, 0.71)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(255, 0, 103)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(117, 0, 255)",
      "tab_line": "rgb(249, 0, 0)",
      "popup": "rgba(248, 255, 0, 0.87)",
      "popup_text": "rgb(255, 152, 1)",
      "tab_loading": "rgb(249, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f675d5a4-4cf1-491b-b75e-c12f4364b0c5}"
    }
  }
}