Examine source code of Dark Red/Black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Red/Black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-016-af8c49de75012ca2c007f953ff2e4499.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(80, 3, 0)",
      "toolbar_text": "rgb(255, 185, 185)",
      "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(255, 0, 0)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 149, 149)",
      "button_background_active": "rgb(131, 0, 0)",
      "button_background_hover": "rgb(101, 24, 24)",
      "frame_inactive": "rgb(141, 0, 0)",
      "icons": "rgb(255, 34, 34)",
      "ntp_background": "rgb(54, 0, 0)",
      "ntp_text": "rgb(231, 231, 255)",
      "popup_border": "rgb(255, 0, 0)",
      "popup_highlight_text": "rgb(205, 250, 255)",
      "popup_highlight": "rgb(255, 113, 113)",
      "sidebar_border": "rgb(255, 7, 0)",
      "sidebar_highlight_text": "rgb(255, 0, 0)",
      "sidebar_highlight": "rgb(255, 213, 213)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_background_separator": "rgb(255, 0, 0)",
      "tab_selected": "rgb(109, 0, 0)",
      "tab_text": "rgb(255, 197, 197)",
      "tab_loading": "rgb(255, 0, 0)"
    }
  }
}