Examine source code of KoGaMa Happy 2

{
  "manifest_version": 2,
  "version": "1.3",
  "name": "KoGaMa Happy 2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(31, 34, 61, 0.38)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(8, 11, 33)",
      "toolbar_field": "rgba(54, 58, 89, 0.51)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(159, 35, 205)",
      "popup": "rgb(15, 21, 53)",
      "popup_text": "rgb(215, 226, 239)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(255, 255, 255)"
    }
  }
}