Examine source code of Summer Moon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Summer Nights",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(48, 65, 129, 0.2)",
      "toolbar_text": "rgb(162, 234, 235)",
      "frame": "rgb(4, 81, 199)",
      "tab_background_text": "rgb(134, 173, 241)",
      "toolbar_field": "rgb(198, 231, 222)",
      "toolbar_field_text": "rgb(8, 51, 152)",
      "tab_line": "rgb(28, 71, 227)",
      "popup": "rgb(6, 13, 106)",
      "popup_text": "rgb(62, 99, 233)",
      "frame_inactive": "rgb(6, 21, 106)",
      "icons_attention": "rgb(6, 13, 106)",
      "ntp_background": "rgb(212, 226, 249)",
      "ntp_text": "rgb(62, 99, 233)",
      "popup_border": "rgb(162, 194, 250)",
      "sidebar_text": "rgb(8, 51, 152)",
      "sidebar": "rgb(134, 179, 241)",
      "tab_background_separator": "rgb(60, 80, 151)",
      "tab_selected": "rgb(100, 163, 250)",
      "toolbar_bottom_separator": "rgb(6, 19, 106)",
      "toolbar_field_border": "rgb(6, 13, 106)",
      "toolbar_field_separator": "rgb(6, 21, 106)",
      "toolbar_top_separator": "rgb(6, 21, 106)",
      "toolbar_vertical_separator": "rgb(6, 21, 106)",
      "tab_loading": "rgb(28, 71, 227)"
    }
  }
}