Examine source code of 80's Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "80's Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-020-48c286b34e53380d46803c2e5603a5b2.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 234, 239)",
      "toolbar_text": "rgb(49, 106, 176)",
      "frame": "rgb(126, 203, 235)",
      "tab_background_text": "rgb(84, 84, 84)",
      "toolbar_field": "rgba(255, 255, 255, 0.53)",
      "toolbar_field_text": "rgb(9, 27, 86)",
      "tab_line": "rgb(165, 173, 207)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(8, 14, 123)",
      "tab_loading": "rgb(165, 173, 207)"
    }
  }
}