Examine source code of Appealing Shade

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Appealing Shade",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(152, 48, 189, 0.18)",
      "toolbar_text": "rgba(241, 213, 249, 0.99)",
      "frame": "rgb(89, 139, 183)",
      "tab_background_text": "rgb(23, 75, 114)",
      "toolbar_field": "rgba(35, 216, 205, 0.3)",
      "toolbar_field_text": "rgb(219, 238, 255)",
      "tab_line": "rgba(241, 213, 249, 0.99)",
      "popup": "rgba(241, 213, 249, 0.99)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgba(241, 213, 249, 0.59)",
      "button_background_hover": "rgba(241, 213, 249, 0.31)",
      "ntp_background": "rgb(89, 139, 183)",
      "sidebar": "rgb(219, 238, 255)",
      "tab_selected": "rgb(23, 75, 114)",
      "tab_loading": "rgba(241, 213, 249, 0.99)"
    }
  }
}