Examine source code of Spring days

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Spring Days",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-010-e9f94a3e61666a4c7677eb9cce17d854.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(197, 208, 157)",
      "toolbar_text": "rgb(103, 113, 68)",
      "frame": "rgb(52, 87, 63)",
      "tab_background_text": "rgb(197, 208, 157)",
      "toolbar_field": "rgb(242, 235, 203)",
      "toolbar_field_text": "rgb(103, 113, 68)",
      "tab_line": "rgb(52, 87, 63)",
      "popup": "rgb(242, 235, 203)",
      "popup_text": "rgb(103, 113, 68)",
      "ntp_background": "rgb(90, 118, 99)",
      "ntp_text": "rgb(242, 235, 203)",
      "tab_loading": "rgb(52, 87, 63)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{36b40cee-ec9f-4bb4-b0fc-efe339ddc02c}"
    }
  }
}