Examine source code of Little Bug in Spring

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spring Day",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(235, 235, 235, 0.4)",
      "toolbar_text": "rgb(31, 43, 118)",
      "frame": "rgb(201, 212, 222)",
      "tab_background_text": "rgb(250, 244, 248)",
      "toolbar_field": "rgb(243, 226, 238)",
      "toolbar_field_text": "rgb(224, 94, 187)",
      "tab_line": "rgb(177, 243, 176)",
      "popup": "rgb(198, 244, 197)",
      "popup_text": "rgb(91, 213, 92)",
      "icons_attention": "rgb(245, 245, 155)",
      "ntp_background": "rgb(206, 226, 244)",
      "ntp_text": "rgb(31, 43, 118)",
      "sidebar_highlight": "rgb(198, 244, 197)",
      "sidebar_text": "rgb(224, 94, 187)",
      "sidebar": "rgb(245, 245, 155)",
      "toolbar_bottom_separator": "rgb(31, 43, 118)",
      "toolbar_field_border_focus": "rgb(214, 26, 45)",
      "toolbar_field_border": "rgb(214, 26, 45)",
      "toolbar_field_highlight_text": "rgb(224, 94, 187)",
      "toolbar_field_highlight": "rgb(244, 166, 221)",
      "toolbar_field_text_focus": "rgb(224, 94, 187)",
      "toolbar_top_separator": "rgb(245, 245, 155)",
      "tab_loading": "rgb(177, 243, 176)"
    }
  }
}