Examine source code of SimpleDarkAzureGradient

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SimpleDarkAzureGradient",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 234, 239)",
      "toolbar_text": "rgb(39, 44, 132)",
      "frame": "rgb(6, 66, 130)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(74, 74, 74)",
      "tab_line": "rgba(57, 206, 212, 0.94)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(57, 206, 212)",
      "tab_loading": "rgba(57, 206, 212, 0.94)"
    }
  }
}