Examine source code of Spring vibes

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spring vibes",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-y"
      ]
    },
    "colors": {
      "toolbar": "rgba(52, 62, 32, 0.81)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(32, 62, 54)",
      "tab_background_text": "rgb(192, 195, 183)",
      "toolbar_field": "rgba(141, 162, 107, 0.29)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(78, 91, 52, 0.67)",
      "popup": "rgba(52, 62, 32, 0.57)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(78, 91, 52, 0.67)"
    }
  }
}