Examine source code of Base16 Default Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "base16-default-dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 40, 40)",
      "toolbar_text": "rgb(216, 216, 216)",
      "frame": "rgb(24, 24, 24)",
      "tab_background_text": "rgb(180, 180, 180)",
      "toolbar_field": "rgb(24, 24, 24)",
      "toolbar_field_text": "rgb(216, 216, 216)",
      "tab_line": "rgb(124, 175, 194)",
      "popup": "rgb(24, 24, 24)",
      "popup_text": "rgb(216, 216, 216)",
      "button_background_active": "rgb(88, 88, 88)",
      "button_background_hover": "rgb(56, 56, 56)",
      "icons_attention": "rgb(186, 139, 175)",
      "popup_border": "rgb(56, 56, 56)",
      "popup_highlight_text": "rgb(232, 232, 232)",
      "popup_highlight": "rgb(88, 88, 88)",
      "sidebar_border": "rgb(40, 40, 40)",
      "sidebar_highlight": "rgb(88, 88, 88)",
      "sidebar_text": "rgb(216, 216, 216)",
      "sidebar": "rgb(24, 24, 24)",
      "toolbar_field_border_focus": "rgb(186, 139, 175)",
      "toolbar_field_border": "rgb(124, 175, 194)",
      "toolbar_field_highlight": "rgb(56, 56, 56)",
      "tab_loading": "rgb(124, 175, 194)"
    }
  }
}