Examine source code of The Horns

{
  "name": "The Horns",
  "manifest_version": 2,
  "version": "1.1",
  "theme": {
    "colors": {
      "frame": [
        22,
        21,
        32
      ],
      "tab_background_text": [
        210,
        214,
        221
      ],
      "toolbar": [
        43,
        41,
        63
      ],
      "tab_line": [
        72,
        61,
        139
      ],
      "tab_loading": [
        102,
        51,
        153
      ],
      "icons_attention": [
        102,
        51,
        153
      ],
      "toolbar_top_separator": [
        22,
        21,
        32
      ],
      "toolbar_bottom_separator": [
        22,
        21,
        32
      ],
      "toolbar_vertical_separator": [
        43,
        41,
        63
      ],
      "toolbar_field": [
        22,
        21,
        32
      ],
      "toolbar_field_text": [
        210,
        214,
        221
      ],
      "toolbar_field_focus": [
        22,
        21,
        32
      ],
      "toolbar_field_border": [
        22,
        21,
        32
      ],
      "toolbar_field_border_focus": [
        69,
        55,
        98
      ],
      "toolbar_field_highlight": [
        69,
        55,
        98
      ],
      "toolbar_field_separator": [
        43,
        41,
        63
      ],
      "bookmark_text": [
        210,
        214,
        221
      ],
      "tab_selected": [
        43,
        41,
        63
      ],
      "tab_text": [
        255,
        255,
        255
      ],
      "tab_background_separator": [
        167,
        173,
        186
      ],
      "button_background_hover": [
        74,
        71,
        87
      ],
      "button_background_active": [
        83,
        80,
        98
      ],
      "popup": [
        22,
        21,
        32
      ],
      "popup_highlight": [
        72,
        61,
        139
      ],
      "popup_text": [
        210,
        214,
        221
      ],
      "popup_border": [
        22,
        21,
        32
      ],
      "sidebar": [
        22,
        21,
        32
      ],
      "sidebar_text": [
        210,
        214,
        221
      ],
      "sidebar_highlight": [
        72,
        61,
        139
      ],
      "sidebar_highlight_text": [
        255,
        225,
        255
      ],
      "sidebar_border": [
        22,
        21,
        32
      ],
      "ntp_background": [
        22,
        21,
        32
      ],
      "ntp_text": [
        255,
        255,
        255
      ]
    }
  }
}