Examine source code of Dark ish Blue

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Dark ish Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 23, 23)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(17, 18, 27)",
      "tab_background_text": "rgb(215, 215, 215)",
      "toolbar_field": "rgb(27, 30, 37)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(35, 83, 205)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "ntp_background": "rgb(14, 15, 25)",
      "ntp_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(30, 56, 120)",
      "tab_loading": "rgb(35, 83, 205)"
    }
  }
}