Examine source code of Sunset (Grey)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sunset (Grey)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 234, 239)",
      "toolbar_text": "rgb(151, 151, 151)",
      "frame": "rgb(201, 173, 142)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(124, 124, 124)",
      "tab_line": "rgb(106, 106, 106)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(130, 130, 130)",
      "tab_loading": "rgb(106, 106, 106)"
    }
  }
}