Examine source code of Dark blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 7, 13)",
      "toolbar_text": "rgb(247, 239, 241)",
      "frame": "rgb(2, 11, 17)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(11, 11, 11)",
      "toolbar_field_text": "rgb(234, 234, 244)",
      "tab_line": "rgb(12, 69, 119)",
      "popup": "rgb(3, 20, 34)",
      "popup_text": "rgb(245, 245, 249)",
      "ntp_background": "rgb(38, 38, 40)",
      "ntp_text": "rgb(248, 248, 252)",
      "tab_loading": "rgb(12, 69, 119)"
    }
  }
}