Examine source code of Gruvbox Dark - Medium

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "GruvBox Theme",
  "theme": {
    "colors": {
      "frame": "#282828",
      "toolbar": "#282828",
      "tab_text": "#fbf1c7",
      "tab_loading": "#ebdbb2",
      "tab_line": "#282828",
      "tab_selected": "#cc241d",
      "bookmark_text": "#ebdbb2",
      "icons": "#ebdbb2",
      "icons_attention": "#fb4934",
      "tab_background_text": "#ebdbb2",
      "toolbar_field": "#282828",
      "toolbar_field_text": "#ebdbb2",
      "toolbar_field_focus": "#282828",
      "toolbar_field_border": "#282828",
      "toolbar_field_border_focus": "#282828",
      "toolbar_field_highlight": "#fb4934",
      "toolbar_field_highlight_text": "#fbf1c7",
      "toolbar_top_separator": "#282828",
      "toolbar_bottom_separator": "#282828",
      "toolbar_vertical_separator": "#282828",
      "popup": "#282828",
      "popup_text": "#ebdbb2",
      "popup_highlight": "#fb4934",
      "popup_highlight_text": "#fbf1c7",
      "popup_border": "#3c3836",
      "ntp_background": "#282828",
      "ntp_text": "#ebdbb2",
      "sidebar": "#1d2021",
      "sidebar_text": "#ebdbb2",
      "sidebar_highlight": "#fb4934",
      "sidebar_highlight_text": "#fbf1c7",
      "sidebar_border": "#1d2021"
    }
  }
}