Examine source code of hierarchy black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Slick Black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(16, 17, 17)",
      "toolbar_text": "rgb(246, 250, 250)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(10, 13, 13)",
      "popup": "rgb(8, 9, 9)",
      "popup_text": "rgb(242, 249, 249)",
      "button_background_active": "rgb(178, 189, 189)",
      "button_background_hover": "rgb(95, 99, 99)",
      "icons_attention": "rgb(109, 113, 113)",
      "icons": "rgb(254, 249, 249)",
      "ntp_background": "rgb(10, 14, 19)",
      "ntp_text": "rgb(250, 253, 254)",
      "popup_border": "rgb(6, 6, 6)",
      "popup_highlight_text": "rgb(130, 134, 134)",
      "tab_loading": "rgb(10, 13, 13)"
    }
  }
}