Examine source code of Blues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blues",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(1, 31, 40)",
      "toolbar_text": "rgb(81, 208, 233)",
      "frame": "rgb(2, 53, 70)",
      "tab_background_text": "rgb(77, 191, 214)",
      "toolbar_field": "rgb(3, 53, 70)",
      "toolbar_field_text": "rgb(79, 213, 238)",
      "tab_line": "rgb(0, 68, 86)",
      "popup": "rgb(0, 38, 49)",
      "popup_text": "rgb(82, 205, 229)",
      "popup_highlight_text": "rgb(38, 124, 136)",
      "popup_highlight": "rgb(42, 121, 131)",
      "tab_loading": "rgb(0, 68, 86)"
    }
  }
}