Examine source code of Black and Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Black and Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(30, 30, 30)",
      "toolbar_text": "rgb(34, 166, 242)",
      "frame": "rgb(37, 37, 38)",
      "tab_background_text": "rgb(182, 183, 185)",
      "toolbar_field": "rgb(51, 51, 51)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 132, 208)",
      "popup": "rgb(51, 51, 51)",
      "popup_text": "rgb(182, 183, 185)",
      "button_background_active": "rgb(0, 132, 208)",
      "icons_attention": "rgb(0, 132, 208)",
      "icons": "rgb(34, 166, 242)",
      "ntp_background": "rgb(30, 30, 30)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_background_separator": "rgb(34, 166, 242)",
      "tab_loading": "rgb(34, 166, 242)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_separator": "rgb(34, 166, 242)"
    }
  }
}