Examine source code of Artifact Dark Theme

{
  "name": "Artifact Dark Theme",
  "manifest_version": 2,
  "version": "2.0",
  "applications": {
    "gecko": {
      "id": "artifact-dark-theme@weijarz",
      "strict_min_version": "60.0"
    }
  },
  "theme": {
    "colors": {
      "tab_line": "#222020",
      "tab_background_text": "#b8b8b8",
      "frame": "#222020",
      "tab_background_separator": "#999090",
      "tab_loading": "#DA4453",
      "icons_attention": "#DA4453",
      "ntp_background": "#3d3d3d",
      "ntp_text": "#909090",
      "toolbar": "#525254",
      "bookmark_text": "#e0e0e0",
      "toolbar_top_separator": "#676769",
      "toolbar_bottom_separator": "#181717",
      "toolbar_vertical_separator": "#676769",
      "toolbar_field": "#3d3d3d",
      "toolbar_field_text": "#b8b8b8",
      "toolbar_field_border": "#181717",
      "toolbar_field_separator": "#181717",
      "toolbar_field_border_focus": "#4B8FD8",
      "toolbar_field_focus": "#3d3d3d",
      "button_background_hover": "#77777A",
      "button_background_active": "#959599",
      "popup": "#3d3d3d",
      "popup_text": "#b8b8b8",
      "popup_highlight": "#10608A",
      "popup_highlight_text": "#fff",
      "sidebar": "#3d3d3d",
      "sidebar_text": "#b8b8b8",
      "sidebar_border": "#181717",
      "sidebar_highlight": "#10608A",
      "sidebar_highlight_text": "#fff"
    }
  }
}