Examine source code of Painted Blues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Painted Blues",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(15, 15, 43, 0.24)",
      "toolbar_text": "rgba(168, 165, 170, 0.75)",
      "frame": "rgb(141, 179, 192)",
      "tab_background_text": "rgb(213, 237, 255)",
      "toolbar_field": "rgba(161, 192, 222, 0.19)",
      "toolbar_field_text": "rgba(204, 231, 252, 0.43)",
      "tab_line": "rgba(199, 212, 238, 0.57)",
      "popup": "rgba(58, 59, 97, 0.51)",
      "popup_text": "rgba(209, 242, 255, 0.33)",
      "button_background_hover": "rgba(155, 177, 199, 0.4)",
      "icons_attention": "rgba(100, 93, 102, 0.58)",
      "icons": "rgba(180, 197, 230, 0.51)",
      "tab_background_separator": "rgba(87, 87, 87, 0.48)",
      "tab_loading": "rgba(57, 69, 94, 0.44)",
      "tab_selected": "rgba(89, 252, 255, 0.19)",
      "tab_text": "rgba(200, 238, 255, 0.59)",
      "toolbar_bottom_separator": "rgba(113, 135, 162, 0.61)",
      "toolbar_field_border_focus": "rgba(172, 208, 249, 0.72)",
      "toolbar_field_border": "rgba(58, 77, 101, 0.34)",
      "toolbar_field_focus": "rgba(101, 124, 157, 0.61)",
      "toolbar_field_highlight_text": "rgba(47, 62, 81, 0.61)",
      "toolbar_field_highlight": "rgba(66, 81, 119, 0.48)",
      "toolbar_field_separator": "rgba(58, 87, 100, 0.36)",
      "toolbar_field_text_focus": "rgba(74, 95, 128, 0.61)",
      "toolbar_top_separator": "rgba(51, 79, 91, 0.57)",
      "toolbar_vertical_separator": "rgba(164, 201, 232, 0.51)"
    }
  }
}